This tip generally applies to small items and groceries.
Don't be afraid to call the company or manufacturer who produced the product that you bought. Their phone number is listed on the package where it says, "Questions or Comments." Call them. If you liked their product, call them and tell them. Then kindly ask the person to add you to the mailing list and to send some coupons.
If you didn't like the product, let them know this too. They don't want unhappy customers. They may try to make your experience better next time by giving you vouchers for another one of their products. If you ask them, they will also add you to their mailing list for coupons.
I have been known to contact several companies with equally good and bad comments. Most every time, I was sent coupons from the manufacturer.
