Daniel Pereira claims you can save up to 75% off of your groceries by collecting and using coupons. His tip is to get a ton of coupons by getting multiple newspaper subscriptions and says that it is a lot cheaper than you think. 

Mr. Pereira says that each Sunday paper usually has one, two or three different publications of coupons and each publication can have $20 or more of savings as well as some free grocery coupons. He also plugs his book which teaches you how to get up to 75% off newspaper subscriptions. 

Of the course of a year you can save hundreds or even thousands of dollars if you learn to use coupons regularly.