There are tons of coupon websites that you can print coupons off of. Just type in coupons in your search engine. Off the top of my head....
www.coolsavings.com www.couponsaver.com & there are tons more. I usually just clip the coupons from the Sunday paper also & I know Wal-Mart honors all competitor ads. So if someone is having an awesome sale, you can take the ad to wal-mart & get the same thing there for the same price. I do this sometimes cause I do my grocery shopping there & don't want to go to both places.