I'm a big fan of VistaPrint. I got some business cards and refrigerator magnets from them back when I had my attempted eBay business, and they were surprisingly good quality for the price I paid. If I ever need printed marketing materials for any of the work at home opportunities I've been trying out, VistaPrint is the first place I will go.
Here's a product I didn't know VistaPrint had available: car magnets. Since I don't have a car of my own (and Chris would never let me put one on the Altima), they're not something I could really use. But for anyone else out there with a business that could benefit from some local marketing, these would be great. I know Chris and I notice advertisements on cars all the time and go home to look them up and see what they're all about. I think the key is to make it vague... just enough to pique a person's curiosity... and be sure to include a highly visible and easy to remember web site URL. By the way, you can use coupon code "CarDoor25" to get 25% off all car door magnets.