Everybody gets postcard offers and coupon flyers in their mailboxes. Magazines often include rip-out coupons with buy-one-get-one-free offers, and there are even those instant coupon-machines that line the aisles of stores. You probably take advantage of instant in-store offers, but do you actually redeem beauty coupons you receive in the mail or through other means, even if you have to make an extra effort to do so?