It takes between 66 days to 365 days to either start and reinforce a new pattern so that it overrides an old pattern. It is more important than the intensity, complexity or duration of your habit when you start. A man is what he repeated, what he repeatedly does - excellence is not necessarily an act, but a pattern of actions. Deaveny: "I'm just going to focus on how long i do it instead of how long I do it"