As a self-published author, getting reviews has to be one of your main goals. You should spend time on it at least once a week, sending out letters and refining your review requests. Once you figure out how to get reviews, it's not going to help unless you know where to go.
Finding Book Bloggers
Save yourself time by looking not for individual book blogs but lists of book review blogs. There are so many book blogs out there, you could never find them all through individual searches. Vary your search query to get more results. Look for book blogs that review indie books, ebooks, and books in your genre.
In the meantime, use my list of book review lists. Some of these are YA-specific, and you'll run into many blogs that are old, broken or no longer about books. But, you will find some viable blogs inside the lists, and nobody ever said it wasn't going to be hard work. These are in no specific order whatsoever:
The Indie Reviewers List
The Indie Book Blog Database
The YA Book Blog directory
Book Bloggers Association
A list of indie book reviewers
Book Reviewer Yellow Pages
Ottinger's Book Review Blog List
Book reviewers on the Web
Book blogger and reviewer listing
Other Book Reviewers