#1 Happiness Trick

A great tip from Health Magazine, March 2012, to add to Principle 22 on gratitude. Once a week, write down five things you're grateful for. Why?

People who did this for nine weeks in a Journal of Personality and Social Psychology study felt happier and healthier, and even exercised more. Plus, says new research from the University of Kentucky, the more gratitude you feel, the less sensitive you are to perceived slights. "Counting your blessings helps you empathize," says study author Nathan DeWall, Ph.D. The likely result: You'll sweat the small stuff less and focus on what really matters.