Gap sale 20% off through eBates
To get the deal, register on eBates, which is free. Then log into eBates and click through to Gap.com from eBates. eBates will track your purchases and make a record of it in your account. Then they send you a check about 90 days later, which is the only downside to using eBates. You get money back, but it takes awhile to get it.
The delay is offset by the huge discounts. Whatever cash back rebate eBates offers you can combine with a coupon code. So make sure to find a percent off or free shipping code to maximize your savings.
Joining eBates benefits WalletPop.