There are some of you who have trouble getting your K-mart (and other) stores to accept IP (internet printed) coupons, even though they are supposed to according to corporate policy.
Save your cereal boxes, cut them apart, you can get 2 sheets of cardstock from them. Use the inside that is blank and print the coupons on those. Make sure that you set your printer for cardstock, not paper so that it won't get stuck. DO NOT USE IN A LASERJET PRINTER. DO NOT USE BOXES IF THERE IS A CLEAR COATING ON THE CARDBOARD! The heat will melt the plastic coating and gum up your printer.
Most cashiers are use to seeing coupons being printed on box tops and the inside of boxes and won't even think twice about accepting them. They also expect them to be in black ink only so you save there too.
Even if you don't have problems, it is a great way to recycle! I use the cardboard from my soda cartons too, just cut to size.
This sheet of coupons was printed on the back of a Honey Bunches Of Oats box. My printer settings does not list cardstock but has a greeting card option that I chose. I also changed the paper size to A4. Worked like a charm!