Make Better Decisions with Mental Models

Mindset & ProductivityIntermediateHome

90 minutes

5 steps

·Intermediate

After 90 min: Make smarter decisions 80% of the time using 10+ proven mental models

What you need

journalpendecision-scenarios

The 90-Minute Plan

Learn Core Mental Models0–15 min

Study First-Principles Thinking, Opportunity Cost, Inversion, Circle of Competence. Understand their core principles and applications

Practice First-Principles Thinking15–35 min

For a decision, break it to fundamental truths. Challenge assumptions. Ask 'Why?' five times. Build decisions from the ground up

Apply Opportunity Cost Thinking35–55 min

What are you giving up by choosing option A? Explicitly consider what you're NOT doing. Often the clearest path becomes obvious

Use Inversion and Checklist55–75 min

Work backwards: What would cause this to fail? Create a pre-mortem. Build decision checklists for recurring decisions

Document and Review Decisions75–90 min

Write decisions made. Note the reasoning and model used. Review results 30 days later. Update your decision framework based on results

Pro Tip

Develop a decision journal. Track what you decided, why, and outcomes. This builds pattern recognition over time

90 min·5 steps

After 90 min: You'll reduce decision anxiety and make choices aligned with your values.

7,900

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90 min·5 steps

After 90 min: Read at 600+ words per minute while retaining 70%+ comprehension

9,800

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90 min·5 steps

After 90 min: Memorize lists of 50+ items, speeches, or sequences using the ancient memory palace technique

11,200

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90 min·5 steps

After 90 min: Consistently enter and maintain 4+ hour deep focus sessions with 90%+ quality output

14,200

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