In today's tough economy everyone is looking to save money, shopping online is now so competitive, that hunting for bargains using online coupon codes can save you a fortune. These codes consist of numbers and letters that you can enter in a promotional code box most likely when you are checking out, some are entered when you have your purchases in your virtual shopping cart. Generally a coupon is good for a certain percent off a particular item, or free shipping on a particular item. Merchants that sell online provide ThinkGeek Promo Codes that can last from a day to a month; they constantly change, so if you are looking to buy something special, check on a regular basis. When checking out and paying it is important to check that your coupon has been deducted from your bill, if it has not, maybe it is out of date.Merchants may also use ThinkGeek Coupons to direct you to clearance inventory or to special sales of the day or week. If you use a retail store specifically, it is a good idea to sign up for email alerts for sales, you may get coupon codes sent that others that just look at a web site will not receive.