I love to shop online. I can find really good deals, and I don't have to tote all of the kids around town. Another perk is that you can get an extra percentage off your total online purchase by linking to the store's website through a third-party website. Many stores will give other websites a money incentive if they can get people to shop on their website, and a growing number of these websites are sharing the money they make with the customer. The percentage that a customer can get back is usually between 3% and 10%. It usually takes three months after the purchase to get your cash back from the website. Here is a list of the websites I look at to find cash-back incentives.
http://www.fatwallet.com/ is the website that I use the most for cash-back shopping. You have to create an account in order to participate, but they offer the largest selection of retailers. You have to accumulate $10 in cash before you can request a check.
bing.com varies some from Fatwallet in the retailers they offer for cash-back shopping. It is a website run by MSN and used to be called Microsoft Search Live, but changed their name to better compete with Google. You must sign up for an account with them to get cash back, and they put your cash earned on your PayPal account, but you can request your money after you have earned $5 cash back.
http://www.mypoints.com/ offers points for shopping online instead of cash, which can be redeemed for gift cards. When signing up for an account, make sure that you use an e-mail address that you don't mind getting a lot of mail in. Because they also send you e-mails that ask you to visit various retailer's websites to also earn points (no purchase required). Most of the points I accumulate come from clicking on these e-mails. It takes awhile to accumulate enough points to earn a gift certificate, but we get a $25 gift certificate about every six months.