http://www.blio.com/ Great eBook reading software.
http://www.scribd.com/ PDF search engine.
http://www.goodreads.com/ My booklist manager. I wish there was a legible android app. Too late to switch, now. I would rather not link one through my facebook, as I am planning to dissolve my facebook account sometime in the near future.
http://www.reddit.com/r/AskReddit/comments/ctlkq/reddit_what_are_your_best_kindle_2_hackstricks/ because i don’t have the guts to buy an iPad
http://www.reddit.com/r/books/comments/a08cm/looking_for_something_to_read_heres_a_messy/ An organized reading list from the hivemind. Good for suggestions outside of your normal circles.