Target is super awesome because they let you use a mfg. coupon + a Target coupon (which we commonly call stacking).
Here is a brilliant example:
Revlon Color Stay nail polish @$3.98
Use the $2.00 off one Revlon ColorStay Cosmetics Product coupon
and use the $2 Target coupon for Revlon cosmetics from the 9/8 SmartSource insert
Final price: As low as free
Thanks Coupon Clippin Daddy