Locus Magazine (Score 4, Informative)

Locus Magazine is a real magazine put together by Science Fiction Fans (notably Charlie Brown who has received many Hugo awards for it). Contains lots of reviews, you'll learn which reviewers have the same taste as you. Yeah, it's not a book club.
The Young Adult section of the library (don't sneer - the quality of the Science Fiction there is very high) shouldn't be forgotten. Cory's Little Brother is a must-read, and is a YA novel.