Besides the convenience of being able to go shopping in your underwear, online shopping offers plenty of opportunities to snag great deals by using cash-back websites and online coupons. A cash-back website is a website where you, the member, get back a little of the money you spend every time you buy something. It’s not like Groupon…more like CouponFly.org. But if you save enough money via couponing, you actually would have the disposable income to try investing. Online coupons work in the same way as their cut-out cousins, but since most are designed to be used online, there’s usually no clipping or printing required.