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7 Mental Models for Smarter Thinking

· O'Neill & Brennan

Most bad decisions don't come from a lack of intelligence. They come from poor thinking frameworks. Mental models help you simplify complexity, see problems from different angles, and make better decisions. Below are 7 mental models that can help you think more clearly and act more effectively. From Stoic Thinking to the 5 Whys framework, these tools can help you approach challenges with greater clarity.

The 5x5 Rule

If something won’t matter five years from now, don’t spend more than five minutes stressing about it.

Why it works:

• Keeps things in perspective • Reduces stress over small problems

Try this:

• Ask: “Will this matter in 5 years?” • Give yourself 5 minutes to think, then let it go.

David Goggins' 40% Rule

When your mind says you’re done, you’re often only at 40% of your real capacity.

Why it works:

• Helps you push past mental limits • Builds resilience and expands your capacity

Try this:

• Push a little further: Set goals slightly beyond your comfort zone • Track it: Note moments when you go past what you thought was your limit

Cognitive Reframing

Change how you interpret a situation to see it in a more positive or empowering way.

Why it works:

• Shifts your mindset from victim to learner • Reduces the emotional weight of challenges

Try this:

• Ask: “What else could this mean?” or “What can I learn from this?” • Replace negative thoughts with a more neutral or constructive perspective.

Growth Mindset

Skills and intelligence aren’t fixed - they grow with effort and practice.

Why it works:

• Reminds you that mistakes are part of progress • Helps you overcome the fear of failing

Try this:

• Reframe failure: Every setback is a lesson • Use “yet”: “I can’t do this… yet.”

Stoic Philosophy

Imagine worst-case scenarios to mentally prepare for challenges before they happen.

Why it works:

• Reduces fear of adversity • Helps you accept what you can’t control

Try this:

• Practice detachment: Identify what’s outside your control and let it go • Visualize setbacks: Think through what could go wrong and how you would handle it

Stockdale Paradox

Face reality as it is - but keep believing you’ll overcome it.

Why it works:

• Accepts challenges honestly • Keeps you focused on long-term hope and progress

Try this:

• Grounds you in reality • Keeps you motivated for the long term

5 Whys Framework

Ask “why?” five times to uncover the root cause of a problem.

Why it works:

• Helps you move past surface-level issues • Leads to clearer, more effective solutions

Try this:

• Keep asking “Why did this happen?” • Don’t stop until you reach the core issue.

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