"How Full Is Your Bucket?" by Tom Rath and Donald O. Clifton is a little book filled with big wisdom. Here’s why you should read this immediately: 

• It reveals simple but powerful strategies that can dramatically improve your relationships with clients, employees, friends, family, and others. These strategies can increase your income, improve your productivity, and even improve your health and extend your lifespan.
  
• It is based on 50 years of research, not guesswork. The authors PROVE their premises.
  
• You can read the book in an hour and begin using the principles immediately. In my opinion, you’ll see results in days, if not hours.
  

The book is based on the relatively new field of "Positive Psychology," which focuses on what is right with people rather than what is wrong.

The book and accompanying web site show you how to replace negativity and criticism with positive strategies to obtain desired results.

Good reading!