If you're planning a visit to a home improvement or electronics store but don't have any coupons, visit the store's online or in-store rebate center. Many home improvement stores offer rebates for big purchases. If you're planning on redoing the bathroom, a trip to Home Depot is probably part of your plan. But, bathroom sinks can get expensive. Find out about in-store rebates. Your savings might not be instant but when you fill out and send in a Home Depot coupon for a rebate, some or all of your purchase price will be rebated back to you.