I *like* to use regular bookmarks but if I don't have one within eyeshot at the moment I need to put down a book, it's just not happening. One problem I have with stiffer bookmarks is that when I cram a book into my commuter bag, the bookmark will sometimes get knocked out. I prefer the bookmark to be shorter than the book overall so I can just have a little bit showing above the top.
You know what I'm saying??
Another bookmark I have that's too pretty to use is a beaded book thong made by Katie MacAllister. The beads are just gorgeous; I managed to get a halfway decent shot of the heart-shaped one:
The oddest thing I've ever used as a bookmark? Well, um, probably a pantiliner. What can I say, it was handy.