Every good book needs a good bookmark. In spite of the fact that I have a whole jar full of collected bookmarks of all sorts, I most often use an unloved antique postcard. One of the joys of buying used books is that one sometimes finds a previous owner's bookmark remains - I've found train tickets, theatre tickets and sales slips from foreign countries - which tells me that I am not the only one loath to part with those little paper mementos.
While I am playing around with my photos - editing and enhancing, rearranging, uploading to any site that will take them - I find some that simply do not crop well into anything other than a bookmark shape. And so I have been 'collecting' them and I have a flickr set devoted just to them: http://www.flickr.com/photos/39450859@N07/sets/72157623342914837/detail/
So I finally converted a bunch of them into photos and spent a couple of afternoons using up paper bits, punching holes, and carefully coloring the cut edges of both photos and papers.