One of the most inspiring performances you'll ever see, and it's a true story, is Will Smith in "The Pursuit of Happyness". I challenge you to watch it and tell me it won't cause you to cry, and then wake up tomorrow wanting to run through walls to achieve your dreams. I highly recommend it.
Here's the trailer to give you the context.
And here's the climactic scene, to show you what victory looks like.
http://www.youtube.com/watch?v=bklNWWoJyzE
YOU CAN DO IT.