Let me give you a little lesson on selling. I'm at RadCon, my third convention, and two hours before it opened I have made my first sale. In about an hour I'll be giving a talk on how to pitch your book in one sentence which will lead directly to a sale, usually. By "usually" I mean, it needs a little help. And by "little help" I mean, you need to come up with what works for you, but if you think you can sit and do nothing and your books will sell themselves, you're mistaken.