I'm really involved in a writer's conference this weekend so there aren't a whole lot of free brain cells at the moment, but here's a link to a great blog post about Susan Boyle and not giving up.
If you are like me and are one of the few people in the country that hasn't seen the clip of Susan Boyle in the show Britain's Got Talent (I saw it just a few days ago), then here's a youtube clip of it. Watch it first here.
Then read the blog "How Do You Know When To Quit" at Murderati. It's inspirational.
So find your dream and don't give up!
(And just ignore those 37 agent rejections, dangit!)