The 7 Habits of Highly Effective People

Today I was re-reading "The 7 Habits of Highly Effective People", by Stephen R. Covey.

Here are the Seven Habits:

1. Be Proactive
2. Begin with the End in Mind
3. Put First Things First
4. Think Win/Win
5. Seek First to Understand, Then to Be Understood
6. Synergize
7. Sharpen the Saw

Are they useful?