Extreme Couponing sounds like an Olympic sport, but it isn’t complicated. It involves combining multiple grocery coupons with great timing (grocery store sales and promotional offers). Once you get the hang of it, extreme couponing will give you a rush, given that you’ll be saving over 85 percent on your groceries. Even better, you don’t have to let coupons take over your life. There’s a science to extreme couponing and we’ve broken it down into four simple steps.