The 7 habits of highly effective people

Has anyone read this by Stephen Covey?

He breaks behaviour into 7 habits which if practised can bring increased success and happiness.

The first three are "private victories" (which will help you build character to be independent), the second three are "public victories" (which help your character blend with others forming interdependence), and the last one is "sharpen the saw"(practice, new energy & ideas).

Habit 1: Be proactive
Habit 2: Begin with the end in mind
Habit 3: Put first things first
Habit 4: Think win/win
Habit 5: Seek first to understand, then to be understood
Habit 6: Synergize
Habit 7: Sharpen the saw

Currently I'm about 2/3 of the way through the book and on habit 5. It reads very well and I'm wondering if anyone has actually put the exercises he mentions into practice? I think it would take much dedication to do everything in the book, at least a semester or twos worth of college in there. Still, I find it an interesting and insightful read.