My bookshelves are a lot less cluttered and I have been savings money on reading material since I found PaperbackSwap.com! (they also accept hardback and audio books) and now I also found BookMooch
I now have all books from the Shopaholic series in very good condition, without spending a dime :-)
The one I'm readin now is from a similar series, it's "Bitter is the new black", which is really funny.
I'd love to get back to more edifying reading materials once I get more sleep on a regular basis, but for the time being I'm sticking to light reads