Lifehacker reader Fabio Sirna sent us a link to his DIY Paper Bookmarks. We like these a lot.
He's included simple instructions with easy to follow photos and a nice PDF template to get you started.
Update: These instructions require printing on A4 paper, which is the European standard. The four bookmarks won't fit on a 8.5x11 sheet of paper. Thanks, Eszter!
DIY Paper Bookmarks [Fabio Sirna]