I made a stamp a while ago. I'm quite proud of it, and I like using it. But I don't often have much reason to.
It represents the various blending forms of communication -- spoken (word bubble) visual (picture) text (word bubble) mixed media (panel with character speaking word bubble) and media-awareness (word bubble breaking panel boundary.) I use it to stamp things I have finished. It is my finishing stamp.
I have even less reason, generally, to use the other stamp I made, which I carved because making stamps is fun. It's a lampshade, which represents lampshading, and I've finally found a use for it.
In the process of lending out some books, I discovered that stamping is quite a good way to mark my property. I mean, it's fun, anyway. And it's got the added advantage of providing a use, per book, for both stamps. When I add a book to my library[1. Which I figure is not exactly the same as owning a book, but have not yet seriously considered the criteria for.] it gets labeled and stamped.
Then, when I finish a book, I stamp the back, with my finishing stamp.