There are plenty of coupon aggregators out there, but the simplicity of RetailMeNot is hard to beat. There's no cumbersome registration process to navigate through. Visitors simply type in the name of the online merchant that they want a coupon code for and -- boom -- there it is.
As a true Web 2.0 site, the coupon codes are user-submitted, and folks report back on whether the discount was successful or not, which helps the best, most reliable, offers bubble up to the top. So keep RetailMeNot in mind the next time you're in the checkout process of an online merchant. If there's a blank box waiting for a coupon code, go out there and fetch one. And if you're at a physical store, use their smartphone app to pull up in-store coupons to present to the cashier to scan.