Your time is limited, so don't waste it living someone else's life. Don't be trapped by dogma — which is living with the results of other people's thinking. Don't letthe noise of others' opinions drown out your own inner voice. And most important, have the courage to follow your heart and intuition. They somehow already know what you truly want to become. Everything else is secondary.
This is a part of the text of the Commencement address by Steve Jobs, CEO of Apple Computer and of Pixar Animation Studios, delivered on June 12, 2005. It's an inspirational talk. You should read the whole thing...specially if you are in your 20's!
Update: I have found a video of this speech, click here. See, you don't even have to read the whole thing!