BBC tries to find The Happiness Formula starting with the fundamental question "What is happiness?" Is the answer to "Think yourself happy"? (video link).Take a 5-question test and discover how happy (or unhappy) you are.
The website is among the Yahoo picks.
References:
Thinking About Medicine - Your Inner Peace
Six Tips for Happiness by a Harvard Teacher
20 Ways to Get and Stay Happy. Time, 2007.
Experienced happiness is largely set by personality, it will temporarily respond to changing circumstances. The Lancet, 2010. http://goo.gl/ot3Kx
Image source: OpenClipArt.org
Image source: OpenClipArt.org