We all want to be happy, but according to research, two-thirds of us don't know how to be happy. Most of us think happiness resides in the things we don't have: the dream house, the perfect mate, the ideal job, the supermodel's body. As proof that possessions don't, in fact, increase the happiness quotient, a study conducted in 1957 and 1992 asked people whether they were happy with what they had in life. In both polls, roughly 30 percent said yes, despite the fact that the standard of living ha