Free food coupons may be obtained in several ways, including subscriptions from food manufacturers or grocers, printed from websites, and retrieved from mailed inserts. According to About.com, some of the best ways include liking brands' Facebook pages, signing up for product tests, and contacting manufacturers.
Programs that offer coupons to test products include Kraft First Taste and P&G Vocalpoint. Sites such as Cool Savings or Coupons.com offer free printable coupons that may be used at most grocery stores. Additionally, stores such as WalMart and Kroger often offer coupons through their respective websites. Of course, be sure to check your pile of junk mail for coupons from Red Plum or similar coupon book programs.