The 8th Habit by Stephen R. Covey
Summary:
What a single guy can learn from this:
What a guy in a committed, monogamous relationship can learn from this:
Where to get it:
http://www.amazon.com/8th-Habit-Personal-Workbook-Effectiveness/dp/0743293193/ref=sr_1_2?ie=UTF8&s=books&qid=1258433368&sr=1-2