@ the cheese thief, there is a very easy to understand and follow video tutitorial about making origami heart book marks like this one, and several other things, too. Check it out! For me, another good use of pages and pieces of pages cut from books in the process of altering...don't throw away potential art/craft materials and have to turn around and go buy some!
Also on these boards
such simple bookmarks!! junk mail envelopes to use! sooo freeee and you can even use up scrap paper or fabric or wrapping paper!