I'm sure that I'm not telling you something you don't know, but to truly be successful in craft making, I highly recommend that you don't just take what you can find in a big box store. If you find what you want there, then by all means, use your 40% off coupon and call it a day. But if you don't find what you want, don't settle. Chances are you'll feel like your final product is just ok, if you feel that the fabric (for example) that you purchased for it is just ok. I cannot encourage you enough to visit independent sellers of jewelry supplies, fabrics and any other things crafty. Both in person and on line. The people that own and run these stores are real experts in their field and are often incredibly helpful and usually very kind. Some of my favorite fabric websites are:
Hope you are finding a little creative time this weekend!