Where do I enter the coupon?

Everyone loves a bargain. However, with the thousands of different web sites that people are shopping at, there is no standard checkout procedure. Some shops have a "Cart" page and a separate "Checkout" page, while others combine the two. Making matters worse is the way different shops deal with coupons. On some sites it is very easy to find, enter, and redeem coupons. On others it is almost like the shop would rather you didn't find the box at all. This site will gradually encompass as many online shops as possible, detailing how coupon codes or promotional codes can be entered.