Two books (one just about to be published) about habits that readers of this thread ought to seriously consider buying:

1. Changing for Good: A Revolutionary Six-Stage Program for Overcoming Bad Habits and Moving Your Life Positively Forward ($10.39)

http://www.amazon.com/Changing-Good-...=3ALUOWNZMDRVG

2. The Power of Habit: Why We Do What We Do in Life and Business ($17.56)[To be published February 28, 2012] Again, regardless of the reference to "Life and Business" this has LOTS to do with exercise!

http://www.amazon.com/Power-Habit-Wh...=3ALUOWNZMDRVG

Take care!