Oh gosh, let me think... I would have to say old VCR tapes. I used to record EVERY SINGLE Pok?mon, Digimon, and InuYasha episode that I watched, and I have about 20 used tapes all in a box in my closet, lol. I'm going to sort through them all soon so I can get rid of the useless ones, though I'll still be stuck with a lot because my grandfather just gave me a huge packet of blank tapes, since he knew I recorded a lot of stuff. XD *sweatdrop* It was a sweet thought, and I'll still use them!
I also have several purses in my closet that I don't really use. My grandmother surprises me a lot with gifts, usually things she finds on sale, and well... she's found a lot of purses on sale. O_o I still keep them, because I'm sure I will use them all one day!