I entered a book contest over at Starry Night. The deadline is tonight though, so if anyone is looking to enter it then you better hurry. The winner receives a copy of Brooke Taylor's novel, Undone.
There was another one for a couple of books at Carrie's YA Bookshelf - Cassandra Clare's City of Bones and Kelley Armstrong's The Summoning. This contest is open until the end of April, so I'd recommend jumping over there and scoping out the rules. I got my fingers crossed, since I'm a bit of a fan of Clare, and I've heard good things about Armstrong.