Sal Khan's Commencement address - MIT News Office - http://web.mit.edu/newsoff...
"Start every morning with a smile — even a forced one — it will make you happier. Replace the words “I have to” with “I get to” in your vocabulary. Smile with your mouth, your eyes, your ears, your face, your body at every living thing you see. Be a source of energy and optimism. Surround yourself with people that make you better. Realize or even rationalize that the grass is truly greener on your side of the fence. Just the belief that it is becomes a self-fulfilling prophecy." - Keith Pelczarski
Great commencement speech... lots more useful, inspiring stuff in the full text. - Keith Pelczarski