One of the best ways to save money while shopping online is to use coupon codes, also known as promotion codes. While there are several sites to use, RetailMeNot is easy to use and has a variety of retailers. Some retailers do not allow posting of codes by users; in this case, check the comments to see if there is anything useful. Also check the maximum number of codes you can use per order, sometimes it is more than one!
RetailMeNot made Beth’s Top Financial Tools list!