This is a lecture I watched in school. Usually, I sleep through these, but I really got something out of this one. I thought I'd share this, because it changed my outlook on some things. Be warned, it is kind of long, but I think it is worth your time. Also, Randy Pausch, the speech giver, died from complications from his cancer in 2008.

http://www.youtube.com/watch?v=ji5_MqicxSo