Ira Glass does some amazing work on his radio program, This American Life. I really like the way that draws compelling and interesting stories out of people. That's why I really like this little video of him talking about what it takes to be good at something. It certainly applies well beyond his form of story telling. First, you have to have taste. You need to recognize what you think is good. The problem is that when you are a beginner, your own work wont live up to your standards. The key is to keep working... Create a lot. Keep producing. And slowly, your work will catch up to your standards.
Good advice Ira.
If you'd like to listen to This American Life, you can do so here.