Even when you know you should start small, it’s easy to start too big. When you dream about making a change, excitement inevitably takes over and you end up trying to do too much too soon. The most effective way I know to counteract this tendency is to use the Two-Minute Rule, which states, “When you start a new habit, it should take less than two minutes to do.”

James Clear, Atomic habits: an easy & proven way to build good habits & break bad ones: tiny changes, remarkable results, London, 2018, p. 176