Found this great quote on this blog:

If you observe a really happy man you will find him building a boat, writing a symphony, educating his son, growing double dahlias in his garden, or looking for dinosaur eggs in the Gobi desert. He will not be searching for happiness as if it were a collar button that has rolled under the radiator. — W. Beran Wolfe

I find this to be true for my husband and for our boys...