“Although many people believe that habits form in twenty-one days, when researchers at University College London examined how long people took to adopt a daily habit, such as drinking water or doing sit-ups, they found that, on average, a habit took sixty-six days to form.”

“Although many people believe that habits form in twenty-one days, when researchers at University College London examined how long people took to adopt a daily habit, such as drinking water or doing sit-ups, they found that, on average, a habit took sixty-six days to form.”

— Gretchen Rubin