When I hear new(ish) writers say if they don't make it by a certain age--35, say--I think of all the writers who made it long past that point. It may not be what you want, but success does happen on it's own time.
I'm reading Writing at Risk, a collection of interviews, and came across Nathalie Sarraute who had her first bestseller, Childhood, at 83. So there's hope, right?
Another interview with novelist Elizabeth Cox, who's married to Michael Curtis, the Atlantic Monthly's fiction editor. Interesting what she says about how listening to music has taught her about structure.