I use can lids for my business cards. I use the Smooth Edge Can Opener, and Avery label #8293 (hard to find, try OfficeMax). I take the can lids (cleaned of course), slap my label on it, and put a magnet on the back. That way, they can keep it on their fridge, and conveniently find my number when they have a kitchen question. It also gives me a chance to show the Smooth Edge Can Opener at my shows since there arent that many recipes to use it. All my guests get a kick out of my business cards! But, i not only use it for my shows, but usually after the registers on the way out at most grocery stores are bulletin boards, and most are lined with a metal frame that i stick several magnets on.