I believe coupons are our best friends in this world. They were created as incentive to entice consumers to try new products or in the case of crafting, come to the craft store and spend your money. I value my coupons greatly. Where I live we have 3 major craft stores. All of them offer different deals monthly. Most of the time it's 40% one item (not currency on sale) and 25-30% one cut of fabric. They also send out coupons for different holidays where you can find 50% off one item also. I use these coupons to save money on larger ticket items like (light boxes, expensive glue's, and crafting supplies (Martha Stewart's line at Michaels is awesome but pricey). 

I have a golden rule to use a coupon every time I go to the store for something. My coupons come to me two ways. One via Internet, the other via mail. The best way to get these coupons is to ask at the store you patronize. Most likely the will have you fill out a small form with your name, address and e-mail address, the magically they start appearing. What's also nice about these coupons is most craft stores have a home accessory section, so you can also use the coupons to decorate your home, or purchase gifts for others. I always keep my coupons in the car with me so that even when I have no intentions of dropping by the craft store, I have them just in case. Happy Shopping.