The best way I have found to obtain high value or even free coupons is by writing to companies regarding a specific product that you use. Let them know what you think of the quality (good or bad) and sometimes they will reward you with coupons for your next purchases. If you have a bad experience it doesn’t hurt to let the company know about it. In the past I have received coupons to get another item for free since something went wrong with the original product. Companies appreciate feedback; it helps them do a better job providing services for you.