I LOVE Ira Glass.(If you are not from the US, he is a public radio broadcaster who hosts a wonderful weekly radio show called "This American Life." It's a bit of everything, short radio stories on a particular theme each week. You can find a free podcast of TAL on Itunes and you can livestream episodes at the TAL site. Go search for the "Fiasco!" episode and prepare to laugh until you cry.)
Anyway. Ira Glass gave some talks about broadcasting, but among them is his discussion of how to keep doing what you do to push forward through the "I'm not as good as I want to be" phase. It's very inspirational and speaks to any creative pursuit.
I do love Ira Glass.