How Habits Are Built

The Habit Loop: Cue, Routine, Reward

Duhigg draws on MIT research to explain how every habit is built from three parts: a cue that triggers it, a routine that runs it, and a reward that tells the brain to remember it.

Craving: Why Habits Feel So Hard to Break

Duhigg explains that the secret ingredient holding every habit together is craving. Your brain starts anticipating the reward the moment it sees the cue, before you have even acted.

The Golden Rule of Habit Change

Duhigg's central finding: you cannot delete a habit. You can only replace the routine while keeping the cue and reward the same. This is called the Golden Rule of Habit Change.

Keystone Habits and the Cascade Effect

Some habits, when changed, trigger a cascade of other changes across your life. Duhigg calls these keystone habits. Identifying yours is one of the highest-leverage things you can do.

Willpower Is a Muscle

Research shows willpower is a finite resource that depletes with use. The best performers do not rely on it: they use routines and pre-planning to reduce how much willpower they need.

Habits Inside Organisations

Companies, schools, and communities run on habits too: routines that govern how information flows, how decisions get made, and who has power. This lesson looks at how organisational habits form and how they change.

The Neurology of Free Will

Duhigg's final section asks a hard question: if habits run automatically below conscious thought, are we responsible for them? His answer reshapes how we think about self-improvement.