I love LibraryThing and highly recommend buying a lifetime membership (only $25). If you are new to LibraryThing I suggest subscribing to Wendi's Book Corner and following the TuesdayThinger posts. You can discover a lot about LibraryThings' features and learn educational helpful hints and tricks.
I'm thinking of some big life changes next year and I've been very involved in researching possibilities. I'm not going to get into specifics now but I hope next year to make an announcement about exactly what I am up to!