There is a browser add on called Honey, which you can get at JoinHoney.com using Google Chrome. This Chrome-only browser extension adds a Find Savings Button to the checkout page of 100-plus shopping sites including Amazon.com. Hit the button and Honey will find and apply any available discounts to your order. It spares you the extra step of testing the coupon codes. You must use Google Chrome browser to be able to benefit from this browser extension add on.