It's so hard to get started creatively - it's really hard to get those first ideas out. You just have to do it over and over again, and hopefully better ones start to come. Also, anytime a good idea comes up, for a long time I think, "Oh, my God, that was so lucky that I thought of that idea, whew, I hope that happens again." The more you work at it, the more it happens, but it still feels lucky.