Save literally HUNDREDS of dollars this holiday season by entering a few keystrokes. Really. Retailmenot.com has all of the up-to-the-minute online coupon codes to enter on literally hundreds of the most popular shopping sites. Those codes will take seconds to enter and leave tons of money where it belongs- in your bank account. And if you use Firefox, be sure to snag the RetailMeNot extension- it will automatically show you coupon codes for a web site when you open the store's page.