Keri Smith has a great blog. She also has a page that collects her "how to" and inspirational pieces which you should look at. The one that has stuck with me the most is her list of ways to feel miserable as an artist.
My favorite is the base your success on one project. It reminds of me of a guy I knew in a creative writing program that had one "professional level" short story and wasn't going to write another until the first one sold. He rewrote it over and over again.