Cue, routine, and reward are the three concrete parts that make up the habit loop popularized by Charles Duhigg. The cue is the trigger that fires the brain: a specific time, a place, a mood, a person, or something you did just beforehand. It tells the brain which automatic behavior to run. The routine is the behavior that gets triggered — it can be a physical action, a mental habit, or an emotional response. The reward is the payoff that closes the loop; it is what lets the brain decide this sequence is worth encoding and running again later. If you want to analyze a habit, naming these three parts separately is the most practical starting point: which cue sets you off, what exactly is the routine, and what reward is the brain actually chasing? Changing a bad habit usually means holding the cue and the reward constant while swapping only the routine in the middle. The chain method builds this trio on purpose: it anchors a task to the same cue every day, keeps the routine simple and one tap to finish, and turns completion into a visible link added to the chain — a tangible reward. With each day, the bond between the three components grows stronger.
Cue, Routine, Reward
The three components that make up the habit loop: the cue that starts the behavior, the routine that is the behavior itself, and the reward that teaches the brain to repeat it.