People ask me all the time, "How can I be successful?" Well, aside from the usual stuff, like show up and keep promoting, the one key to success is to publish a book so good, your reader can't put it down. But to take it a step beyond that, I would say publish something that has been edited often, and by someone who knows how to edit a book and isn't afraid to tell you the things you may not want to hear.
I'd also add "hiring an editor who has a shovel and an egg timer and is unafraid to use either."
/dithers over NaNo work