Made Simple: Ten Mental Models

Better thinking does not require memorizing hundreds of theories.

It requires having the right mental models available when the situation gets complicated.

Made Simple: Ten Mental Models brings together ten practical frameworks designed to help you examine decisions, challenge assumptions, recognize leverage, understand uncertainty, and respond more deliberately when conditions change.

Inside, you’ll learn how to use:

• Decision Matrix — compare options by explicit criteria, weigh tradeoffs, and make clearer choices when several options appear equally reasonable.

• Two-Way Door Decisions — distinguish reversible choices from genuinely difficult-to-reverse decisions so you can match your decision speed to the actual stakes.

• Red Teaming — deliberately challenge your own plans, surface blind spots, and test whether an idea is as strong as it appears.

• Lindy Effect — use the survival of ideas, practices, and technologies as one useful lens for thinking about what may endure, while recognizing the limits of that reasoning.

• Chesterton’s Fence — understand why an existing rule or structure may exist before deciding that it should be removed or changed.

• Circle of Competence — identify the boundaries of what you genuinely know, recognize when confidence has outrun competence, and expand your knowledge deliberately.

• Occam’s Razor — compare competing explanations and prefer the one requiring fewer additional assumptions when the alternatives account for the evidence equally well.

• Pareto Principle — identify genuine imbalances between inputs and results so you can focus attention where the greatest leverage actually exists.

• OODA Loop — observe, orient, decide, and act in a continuous cycle when circumstances are changing faster than a static plan can keep up.

• Pre-Mortem — imagine that a plan has already failed, work backward to identify why, and turn those potential failures into concrete actions.

Each model is treated as a practical discipline rather than a slogan. The books explain what each framework actually means, where it helps, where it can be misused, and how to apply it to real decisions and situations.

The goal is not to give you a formula that makes every decision for you.

The goal is to give you better questions, clearer distinctions, and practical tools for thinking before you act.

Ten mental models. Ten ways to examine the situation in front of you.

Start with the model that fits the problem you’re facing—and build from there.