I found this advice from Ken Goldstein (from his book, Endless Encores ) particularly helpful. He says: "You have to be innovating all the time. The only sure path to a limited repertoire is not to push yourself beyond the familiar. Your range is only gated by your courage to pursue the unknown, despite the doubters who relish the false safety of narrowing your path. You risk, you stretch, you can't know what's going to stick. No matter how much you know the familiar will carry you, you navigate the balance of old and new, constantly committing to reinvention. Repeat success is getting comfortable with the uncomfortable, knowing that luck will shine again, but never knowing when or how."