patiodog wrote:Don't even use the things. I just dog-ear the pages.
Two things i hate:
Dog-ears (in Flemish we call them Donkey-ears)
A book with a broken back.
I often give my books to friends so they can absorb some culture too

But when they bring back my book with dog-ears or a broken back. They are on my blacklist, forever!!!
To answer the question: I use whatever is in my reach. I always got some piece of paper in my wallet. Sometimes i just remember the page.