← All topics
💡

Thinking Skills

Mental models and reasoning tools for clearer thought.

17 posts · Thinking & Decisions

  1. 1

    How to Use This Guide

    This guide is for builders: founders, developers, designers, product managers, and curious learners who want to think more clearly, build better habits, and…
  2. 2

    How Your Mind Already Thinks (and Why It Misleads You)

    Before you can think better, you have to see how you already think. That sounds obvious, but most people never look.
  3. 3

    First-Principles Thinking: Reasoning From the Ground Up

    Most people solve problems by looking around at what already exists and copying it, tweaking it, or averaging it. That works — most of the time.
  4. 4

    The Toolkit: How to Actually Do First-Principles Thinking

    First-principles thinking sounds powerful in theory. But theory alone does not solve a single real problem.
  5. 5

    Systems Thinking: Seeing the Whole, Not the Parts

    Most of us are trained to fix problems one at a time. A sales number drops — boost the ad budget. A product ships late — add more engineers.
  6. 6

    Section 5: Leverage Points & Mental Models for Better Decisions

    Most people try to fix problems by turning the most obvious knob — raising a price, hiring one more person, sending one more email.
  7. 7

    The Science of Habits: How Behavior Becomes Automatic

    You wake up, shuffle to the bathroom, and brush your teeth. You did not plan it. You did not weigh the pros and cons. Your hand just reached for the toothbrush.
  8. 8

    SECTION 7: Behavior Design Models: Why People Do (and Don't) Act

    Every product team wants users to take action — sign up, form a habit, share, upgrade. Every self-improvement effort wants a person to take action — exercise,…
  9. 9

    Designing Your Own Habits That Actually Stick

    Most people try to change their behavior with willpower. They decide to wake up earlier, eat better, or exercise daily — and they push hard for a week or two.
  10. 10

    Designing Behavior for Others — Ethically

    Every product you build is a behavior-design machine, whether you planned it that way or not. A button placement, a notification timing, a progress bar — each…
  11. 11

    What Creativity Really Is (Demystified)

    Most people believe creativity is a mysterious gift — something you either have or you don't. Some imagine it as a lightning bolt that strikes geniuses in the…
  12. 12

    Idea-Generation Techniques: Producing Options on Demand

    Most people treat idea generation as a mysterious event — you either get struck by inspiration or you don't. That belief is wrong and expensive.
  13. 13

    Section 12: The Creative Mind: Flow, Incubation & Beating Blocks

    Most people treat creativity as a lightning bolt — something that either strikes you or does not. That is exactly wrong.
  14. 14

    Putting It Together: A Thinking Operating System

    You have now met the three pillars of sharp thinking: first-principles and systems thinking (understanding what is really true and how things connect),…
  15. 15

    Glossary of Terms

    5 Whys A root-cause analysis technique invented at Toyota: ask "Why?" five times in sequence, each time targeting the answer to the previous question, to move…
  16. 16

    Frequently Asked Questions

    Q: Is first-principles thinking just another way of saying "think harder"? Not quite. "Think harder" is vague and exhausting.
  17. 17

    Revision Cheat Sheet

    Use this page for fast review before a strategy session, a design sprint, or any problem that deserves clear thinking.