Pictures
I would keep every picture that I have. I think that pictures are the one of the closest things to people next to the real thing.

DVDs and Books
I have compiled a good movie/book collection and some of them are very nostalgic. I would keep them in the bathtub if I had to.

Clothes
Well I don't want to be walking around naked so I would have to keep my clothes in order to avoid awkward situations. Clothes take up a lot of room but I would keep them.