there is no magic number University College London study Busting the 21 days habit formation myth Busting the 21 days habit formation myth University College London study Busting the 21 days habit formation myth Busting the 21 days habit formation myth Habits and the 21 day myth Busting the 21 days habit formation myth Busting the 21 days habit formation myth Busting the 21 days habit formation myth University College London two months or longer takes anywhere from 18 to 254 days Busting the 21 days habit formation myth estimate Busting the 21 days habit formation myth Busting the 21 days habit formation myth from 18 to 254 days Busting the 21 days habit formation myth Busting the 21 days habit formation myth Busting the 21 days habit formation myth is somewhat suspect Busting the 21 days habit formation myth Busting the 21 days habit formation myth Busting the 21 days habit formation myth It takes more than 21 days to form a habit. suggested that it was more like 66 days study Busting the 21 days habit formation myth some debate about about the 21 day habit forming rule One University College London study It takes more than 21 days to form a habit. Busting the 21 days habit formation myth work Busting the 21 days habit formation myth