Is it true that if you do anything for three weeks it will become a habit?

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Related HowStuffWorks Articles


  • Benefit, Ariane, M.S.Ed. "Mythbusting: Are New Habits Established in 21 Days?" Neat & Simple Living. June 20, 2007.
  • Delude, Cathryn M. "Brain researchers explain why old habits die hard." MIT News. Oct. 19, 2005.
  • Discipline: 30 Days to Form a New Habit. The Secret.
  • The Essence Of Habit Formation. Self Improvement Mentor.
  • Graybiel, AM. "Habits, rituals and the evaluative brain." Annu Rev Neurosci. 2008;31:359-87. PubMed.
  • Ludington, Aileen, MD. "Habit formation: How to change." The Quiet Hour.
  • Newby-Clark, Ian. "Five Things You Need to Know About Effective Habit Change." ZenHabits.
  • Rae-Dupree, Janet. "Can You Become a Creature of New Habits?" The New York Times. May 4, 2008.
  • Tips on how to break a habit. Self Improvement Mentor.

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