A new use for an extra five-year diary?

At the beginning of this year I bought my first five-year diary. Since I had never had a that kind of diary, I wasn't sure what kind of features I wanted and needed. I ended up buying a cheap diary that I wasn't happy with the size and quality of.

A few weeks later I bought a new diary, which I have been using happily for several months now. However, I still have my old diary and I don't want to just throw it away. I would like to find a new use for it. I can't give it away because it already has a few entries in it.

I've been thinking about maybe writing down in a journal what books I've read. I've also been thinking about a gratitude journal, but I'm not too excited about that idea. It would be great to find some fun and creative use for the journal.

Do you have any ideas for what I could use the old diary for? :)