The habits of highly successful people allow them to consistently perform behaviors that breed success. Everything from eating well to responsible spending to task completion and beyond requires habits that make such behaviors part of our daily life. Michael Jordan spent his off seasons taking hundreds of jump shots a day. Cy Young award-winning Phillies pitcher Roy Halladay routinely does a 90-minute workout before practices. The young Venus and Serena Williams would wake up at 6:00 am to hit tennis balls before school. Highly successful people have learned to develop good habits, and it takes discipline, courage and hard work on a daily basis to keep those habits in place. It makes perfect sense to adopt habits that will facilitate success, yet, why are some so difficult to adopt?
From: http://www.forbes.com/sites/jasonselk/2013/04/15/habit-formation-the-21-day-myth/