Concept
Habit Loop
The habit loop is the three-part circuit behind every habit: a cue that triggers it, a routine that carries it out, and a reward that teaches the brain to run it again.
Charles Duhigg made the habit loop the organising idea of The Power of Habit, drawing on the MIT research that watched rats learn a maze until the behaviour ran without conscious effort. The point of the loop is not that habits are automatic, which everyone knows, but that they are structured: a cue, a routine, a reward, every time. Most attempts to change a habit fail because they attack the routine directly while leaving the cue and the reward in place, so the brain keeps looking for the reward and finds a new routine to reach it. What people get wrong is treating a habit as a decision they keep making badly. It is a circuit that fires on its own, and a circuit you can see is one you can rebuild.
A real-life example
Every afternoon around three, Deniz walks to the office kitchen for a pastry. For a week he writes down what happens just before: not hunger, but the same restless lull after a meeting. The cue is boredom, the reward is a break and a chat. He keeps both and swaps the routine for a walk to a colleague's desk. The pastry stops on its own.
How to use it
- 1Catch one habit today, good or bad, and write its three parts on one line: cue, routine, reward.
- 2Change only the routine. Keep the cue and give yourself the same reward through a different action.
- 3Test the reward by asking what you actually wanted afterwards; if the craving persists, you have named the wrong reward.