Your smart phone can be a useful tool for back to school shopping, or any kind of shopping.
Sale Locator tells which stores are having sales based on your location as long as the GPS on your phone is turned on.
A bar code scanner that also scans QR codes and compares prices is essential. One of the ones most recommended by Money Magazine and other experts is Red Laser.
Once you get into a store you can have fun and earn points with Shopkick. When you walk in the door you you check in, and it immediately gives you digital coupons and lists of store specials. You can also earn points for checking in and for scanning certain products. The points can be redeemed for gift cards and other prizes.