I sign up for the forumla emails (Enfamil, Similac). This also gives me their coupons and checks in the mail. I don't use Similac and sometimes I have more Enfamil Checks that I can use - so I leave them at my kids' daycare center near the signin book - or give them directly to the infant room teachers to pass out to the other parents. Some of the checks are for $5 or $7 off. And they can be used anywhere - like a gift card or personal check - even at places that don't accept coupons.