Do you have any toys or other things that have sentimental value? Something that you can't see yourself ever throwing away, because the memory that you've attached to it still lingers?
During the first week or so of the new year I always clean house. I obviously dust, wash and vacuum a lot more often than that, but that first cleaning session is an intensive scrubbing. I am not a hoarder, but there are some of my old toys that have survived many such cleaning onslaughts.
One is an old fashioned red rag doll simply called Ragdoll. I know she was a gift when I was three or four years old, but I cannot remember from whom. She has been re-stuffed many times. The material is getting really threadbare, so at this point it's probably only the dust keeping her together. She was my favourite toy to cuddle because she is quite flat, so I didn't wake up when I rolled over her. Though she stayed behind when I went to university, she made the journey to my first house after that and has stayed with me. I honestly can't imagine ever parting with her.
I also have old casette tapes (really showing my age here). The ones I kept are mostly stories read by voice actors - basically abridged audio books, if you want. I doubt I'll ever listen to all of them ever again, but I just can't throw them out.