This summer I started drinking mineral water (couldn't stand the stuff before, but suddenly it appeals to me), and I found myself compelled to keep the bottle caps. It seemed such a waste to throw them away. So I gave in to the compulsion and figured if I didn't do anything with them after a while, then I'd get rid of them, but I'd give it a chance first.
Then I discovered that even with all the things I have, I lacked a 1" circle punch. Now that situation is remedied, and with some Graphic 45 paper and a little Glossy Accents, I have some great holiday embellishments! I may use some on cards, but I'm also thinking that for anyone who buys cards from me, I could wrap the cards up in tissue paper, tie a ribbon around the package, and glue a bottle cap onto the ribbon. A nice presentation can make people feel their money was well spent, and makes them feel special into the bargain.