Every day, you make hundreds of decisions.

Some are small, such as what to eat, what to buy or which task to complete first. Others can influence the direction of your career, business, finances and relationships.

Should you accept an opportunity? Should you invest now or wait? Should you continue with a plan that is not working? Should you trust your instinct or gather more information?

The difficulty is not always a lack of options. Often, the real problem is that you do not have a clear way to evaluate them.

This is where mental models can help.

Mental models are simple ways of understanding how the world works. They help you organise information, recognise patterns and consider the possible consequences of your choices. Instead of depending entirely on emotion or instinct, you use a reliable thinking framework.

As Jonathan Maharaj, speaker on money, leadership and personal growth, explores through his work, better decisions do not always require more information. Sometimes, they require a better way of thinking about the information you already have.

What Are Mental Models?

A mental model is an explanation, principle or framework that helps you interpret a situation.

You already use mental models, even if you do not consciously recognise them. When you assume that hard work will produce better results, you are using a mental model. When you compare the cost of a decision with its potential benefit, you are using another.

However, not every mental model is accurate or useful.

Some of your existing models may have been formed through childhood experiences, cultural expectations or previous disappointments. You may believe that taking risks is irresponsible, that asking for help shows weakness or that working longer always produces more value.

These beliefs become the lenses through which you see your choices.

Learning new mental models gives you more than one lens. It allows you to examine a problem from several perspectives before deciding what to do.

1. First-Principles Thinking

First-principles thinking involves breaking a problem down into its most basic facts.

Instead of accepting the way something has always been done, you ask what is genuinely true and what has merely been assumed.

Imagine you want to grow your business. You may assume that growth requires a larger office, more employees and a bigger advertising budget because that is how other businesses appear to grow.

First-principles thinking asks you to step back:

• What does growth mean for this business?
• What creates value for its customers?
• Which resources are genuinely necessary?
• What assumptions are being treated as facts?

You may discover that sustainable growth could come from improving customer retention, simplifying a service or strengthening existing relationships.

This model is particularly valuable when you feel trapped by conventional thinking. It gives you permission to question the structure of the problem itself.

2. Inversion

Most people approach a goal by asking how they can achieve it.

Inversion encourages you to ask the opposite question:

What would guarantee failure?

If you want to improve your financial position, ask what would make it worse. The answers might include uncontrolled spending, avoiding financial reviews, taking risks you do not understand or ignoring debt.

If you want to build a strong business, consider what would destroy customer trust. Poor communication, inconsistent service and unfulfilled promises may appear on the list.

Once you identify the behaviours that create failure, you can work backwards and avoid them.

This does not mean you should focus entirely on negative outcomes. Inversion simply helps you see risks that enthusiasm may hide.

Sometimes, success is not created through one brilliant decision. It is created by consistently avoiding predictable mistakes.

3. Opportunity Cost

Every decision carries an opportunity cost.

When you choose one option, you give up the time, money or attention that could have been used elsewhere.

The price written on a product is only its visible cost. Its complete cost also includes what that money can no longer do for you.

The same principle applies to time. Saying yes to an unnecessary meeting may mean saying no to focused work. Continuing an unsuitable project may prevent you from exploring a more promising one.

This mental model can help when several opportunities appear attractive. Instead of asking only, “Is this a good option?” ask:

“Is this the best use of my limited resources right now?”

A decision can be good in isolation and still be wrong for your current priorities.

Understanding opportunity cost makes it easier to say no without guilt. You are not rejecting every possible benefit. You are protecting the option that matters more.

4. Second-Order Thinking

Many decisions are based on immediate consequences.

You make a purchase because it brings pleasure today. You reduce an expense because it improves this month’s numbers. You avoid a difficult conversation because it prevents discomfort.

Second-order thinking asks what happens after the immediate result.

A discount may attract more customers, but will they continue buying when the price returns to normal? Avoiding a difficult conversation may preserve peace today, but will the unresolved issue become more damaging later? Working late may help you finish a project, but what happens if overwork becomes your normal routine?

The first effect of a decision is usually easy to see. The second and third effects require more thought.

Before making a major choice, consider:

• What happens immediately?
• What is likely to happen next?
• If I repeat this choice, where will it lead?
• Who else may be affected?

This model is especially helpful when an option offers immediate relief but may create long-term difficulty.

5. The Circle of Competence

Your circle of competence includes the subjects and situations you understand well.

Outside that circle, your knowledge becomes limited, even if your confidence remains high.

Problems often arise when people confuse familiarity with expertise. Reading several articles about an investment does not necessarily mean you fully understand its risks. Running one successful business does not make every new industry predictable.

Recognising the boundaries of your knowledge is not a weakness. It is a form of wisdom.

Ask yourself:

• What do I genuinely understand?
• Where am I making assumptions?
• What expertise am I missing?
• Who could help me evaluate this properly?

You can expand your circle of competence through experience and education. However, until that happens, decisions outside your expertise deserve greater caution.

Knowing what you do not know can protect you from expensive confidence.

6. Probabilistic Thinking

Life rarely offers complete certainty.

However, people often speak about uncertain outcomes as though they are guaranteed. An opportunity will either succeed or fail. An investment will rise or fall. A plan will work or it will not.

Probabilistic thinking recognises that several outcomes are possible.

Instead of trying to predict one future perfectly, you consider a range of possibilities and estimate how likely each one may be.

For example, before starting a project, you might consider:

• What is the best possible outcome?
• What is the most likely outcome?
• What is the worst reasonable outcome?
• Can I recover if the worst outcome occurs?

This approach does not eliminate risk. It helps you make risk more visible.

A good decision can still produce an undesirable result because uncertainty exists. Similarly, a careless decision can occasionally produce a good outcome through luck.

Therefore, evaluate your decisions by the quality of your thinking, not only by the result.

7. Margin of Safety

A margin of safety gives you room for unexpected problems.

You may create a financial emergency fund, allow extra time for a project or avoid committing every available resource to one opportunity. These choices provide protection when reality does not follow the plan.

People often remove their margin of safety when they feel confident. They assume income will remain stable, deadlines will be met and expenses will stay predictable.

However, the future rarely develops exactly as expected.

A margin of safety is not pessimism. It is an acknowledgement that your estimates may be imperfect.

When making a commitment, ask:

“What room have I left for being wrong?”

The larger the potential consequence, the more important that room becomes.

8. Compounding

Compounding is usually discussed in relation to money, but it influences almost every area of life.

Small actions repeated consistently can produce significant results over time. Savings grow through accumulated returns. Skills improve through regular practice. Trust develops through repeated reliability.

Negative patterns compound as well. Small debts can accumulate. Delayed conversations can become larger conflicts. Minor inefficiencies can gradually consume time and profit.

This mental model helps you look beyond the size of one action and consider the effect of repetition.

Ask yourself:

“What will happen if I continue making this choice for the next five years?”

A single action may appear insignificant. Its direction is what matters.

9. Reversibility

Not every decision deserves the same amount of time and stress.

Some decisions are easy to reverse. You can test a new routine, try a different marketing message or cancel a monthly service. Other choices, such as selling an important asset or making a major long-term commitment, may be difficult to undo.

Before overthinking a decision, ask whether it is reversible.

If the choice can be changed easily, act with reasonable speed and learn from the result. If it carries permanent or expensive consequences, slow down and examine it more carefully.

Many people treat every decision as permanent. They spend too much time analysing small choices and later make important decisions when they are mentally exhausted.

Matching the amount of thought to the seriousness of the decision protects both your time and your energy.

10. The Map Is Not the Territory

A plan, forecast or spreadsheet is a representation of reality. It is not reality itself.

Plans are useful because they help you prepare. However, they are built using assumptions. Conditions change, people behave unexpectedly and new information becomes available.

The mental model known as “the map is not the territory” reminds you not to become too attached to your original plan.

Your financial forecast may be carefully prepared, but actual income and expenses may differ. Your career plan may appear clear, but your priorities may change. A strategy that worked previously may no longer match the current environment.

Good decision-makers respect the plan while continuing to observe reality.

Changing your approach when the facts change is not inconsistency. It is responsiveness.

Build Your Own Decision-Making Toolkit

No single mental model can explain every situation.

Opportunity cost may help you choose between projects, while inversion may reveal hidden risks. Second-order thinking may show the long-term consequences, while the margin of safety helps you prepare for uncertainty.

The value comes from combining different models.

Before making an important decision, try asking:

1. What are the basic facts?
2. What assumptions am I making?
3. What could cause this decision to fail?
4. What am I giving up by choosing it?
5. What happens after the immediate result?
6. Is this decision reversible?
7. What room have I left for error?

You do not need to use every question each time. Even two or three can create enough distance between an emotion and an action.

Better Thinking Creates Better Choices

Mental models will not give you perfect predictions. They cannot remove uncertainty or guarantee that every choice will produce the outcome you want.

What they can do is improve the quality of your thinking.

They help you slow down when a decision carries serious consequences and move faster when an option can be tested safely. They reveal hidden costs, challenge assumptions and encourage you to think beyond the immediate result.

As Jonathan Maharaj, speaker on money, leadership and personal development, emphasises, clarity does not always arrive through gathering more information. It often comes from asking better questions.

The next time you face a difficult decision, do not immediately ask, “What should I do?”

First ask, “Which way of thinking will help me understand this clearly?”

That small shift can lead to calmer choices, fewer avoidable mistakes and decisions that remain valuable long after the moment has passed.

Make Better Decisions With Better Thinking

You do not need more information to make every decision better. You need the right questions, the right perspective and a willingness to challenge your assumptions.

If you want to become more intentional about how you approach decisions in business, money and life, start building your own mental-model toolkit. The goal is not to eliminate uncertainty. It is to make better decisions despite it.

Want to go deeper?

Explore Jonathan Maharaj’s insights on money, leadership, decision-making and personal growth, or connect to learn more about upcoming resources, conversations and practical tools designed to help you think more clearly and act with greater confidence.

Start with one question today:
What assumption am I making that I have not actually tested?

Learn more and stay connected with Jonathan Maharaj.