A number of years ago, I started a tradition. I cut a slice off of the bottom of our Christmas tree before we get rid of it each year. After the wood dries out, I then label it with the year. I also try to label them with anything noteworthy for that Christmas — e.g., a child’s first Christmas. Finally, I place them in a box to save. I’ve got about ten years’ worth of tree cuttings at this point, and it’s really fun to look through them each year.
(For the record, I stole this tradition from my cousin Clinton – he blew me away when he showed me his collection of tree cuttings years ago, and I knew instantly that I wanted to do the same thing. Thanks, Clinton!)