I've found that Goodreads has really helped to get my book out there. Though I got an invite to join because someone was already reading my book (I was like "Squee!")
Join groups that you're actually interested--Indie Book Collective, for example--and rate books that you've already read. Friend people that have similar interest to you and to your book. Basically, it's a chance to personally connect to your possible-readers.
Sometimes I give out freebie coupons to a group I'm a member of and that really helps. A lot of people will read my reviews to get my taste, get a free book, then someone will end up buying all my books at one time.
It makes it a lot easier to find people of your particular genre.
If you friend me on there, I'll friend you back. Just let me know where you're from
