Several years ago I was arriving to a networking event a bit late. I parked my vehicle near the back of the lot and walked past all of the other attendees' cars with their wraps and sign magnets. I noticed a few realtors had attached business card holders to their cars. For some reason I kept thinking about how smart it was to let people grab a card while I could be doing other things, like shop. A few years later I bought one of these card holders from a local office supply store. I measured out how much room I had on the back of my car as well as the size of the card holder. Next I went to Vistaprint and designed a sign magnet with enough room for the card holder to stick on without blocking my message. You can see the results below. I quickly realized that the sun and rain would make my cards look "weathered" after a while so I learned to only leave 2 cards in there at a time. (Cards costs too much to throw out a dozen at a time because they got soggy.) This also ma...