This morning Chuck Wendig talks self-publishing. If you're even kinda, sorta thinking about putting your book out there yourself, read his 25 Steps to Becoming a Self-Published Author. I don't always agree with everything Chuck says, but that's immaterial. Read it. READ IT. Commit it to memory. Take it to heart.
Then, as with every piece of advice, use what works for you and toss the rest. (Just make sure you aren't throwing diamonds in the trash because you thought they were stupid rocks.)