I thought it interesting, that later the same day of posting this thread, I see an article on MSN entitled...

7 smart ways to buy happiness

# 6 hit the mark dead on...

6. Giveaways

A surprise benefit of giving to others, or to a cause you believe in, is how good it makes you feel.

Studies show that altruism not only tickles the feel-good centers in the brain, but it also creates a sense of social bonding and mutual support that enhances your personal well-being.

You don't have to give millions to get that payoff. The most important thing isn't whether you spend money or volunteer time or contribute goods, but that whatever you share -- and however you share it -- means a lot to you.