My friend Hilary Weeks once told me, "I don't worry about what others think of me, I worry about what they think about themselves when they're with me." I've never forgotten it.

Kindness is the hallmark of truly happy and successful people. Who did you uplift today? Who had a better day because they interacted with you? My found that my unhappiest moments are those when I'm worried completely about "what's in it for me." My happiest times are when I am focused on the welfare of other people.