My books.
I remember once back in middle school when I was completely retarded over the Anne Rice vampire books, my best friend wanted to borrow my copy of "The Vampire Lestat." I reluctantly let it go, but when I saw her with it at school the next day, the cover was bent! ACK! My boooook!
I made up some ridiculous story about how my mom wanted her to give the book back, because I shouldn't loan out my things (not true, but plausible as my mother is kinda...also bent), and took it back.
I'm MUCH better now and can loan books out to certain people without being too worried about them, but my Kindle has made my life a lot easier - "Sorry, I do have a copy of that, but it's on my Kindle, no can sharesies."
