Have you wondered how long it should take to develop a skill into a habit?  In response to a listener request, Karel addresses the very important topic in this episode.  He describes the factors that determine the length of time that it takes and then summarizes the rules of thumb for simple and complex behaviors as well as what it takes to get to mastery.  The top 10 list for this episode provides advice on optimizing the realization of the development of skills into habits.