I have always held the belief that making or breaking a habit followed one simple formula:
Have idea to change or start activity+ 21 days of doing or not doing that activity =Habit Formed
However, when opening my email today and reading an excerpt from a new book, by Jeremy Dean, “Making Habits, Breaking Habits: Why We Do Things, Why We Don’t, and How to Make Any Change Stick
seems to indicate the harder the change, the longer the timeframe to move it from “idea” to “habit”. The range has been found to be anywhere from 21 to 96 and sometimes more depending on the complexity of the change. I have to say as someone trying to change eating habits, reading habits and spending habits all in one year, this comes as something of a relief.