I recently got a used ipod and started listening to podcasts. At first they helped me pass the time while walking the dog or exercising at home. Then I started exploring the itunes diet/fitness area and found some that directly help with my motivation, commitment etc.
Not sure if I am allowed to say specifically which ones have helped. In any case, checking on itunes (or ipodder/equiv. for other mp3 players) under health/fitness/diet might be useful. Admittedly there is a lot of garbage being podded, but there is some good stuff as well.
Has anyone else tapped into this source?