Module

Small and Sustainable Behaviour Design

This module teaches you to build new behaviours on top of the photograph you took in the observation module. Across four lessons you practise shrinking a behaviour, anchoring it to an existing event, preparing a fallback for busy days, and returning after a lapse.

In this module

  • You can reduce a new behaviour to a two-minute starter version
  • You can link the behaviour to a reliable event that already exists in your day
  • You can define normal-day and busy-day versions of the same behaviour
  • You can continue after a lapse with a pre-planned return step, without self-blame

Design beats willpower

When trying to build a new habit, most of us lean on the same tool: willpower. But willpower fluctuates through the day and is the first resource to run out under pressure. This module takes a different approach: you design the behaviour to be so small, so well placed and so flexible that keeping it going barely needs willpower at all. A small behaviour can look trivial at first; but once it has taken root, it tends to grow on its own. The hard part is not growing it — it is starting it and settling it in.

The order of the lessons

The module follows the life cycle of a behaviour. First you define the starter version in Making a Behaviour Smaller. Then, in Linking a Behaviour to an Existing Event, you find it a reliable place in the day. Normal-Day and Busy-Day Versions makes the behaviour resilient to real life's ups and downs. The final lesson, Returning After a Lapse, teaches you to close the inevitable breaks before they become permanent. When you finish the module, check your knowledge with the programme assessment.

Lessons

First published: 2026-08-12Last reviewed: 2026-08-12Editorial status: working editionReport an error