If you color or highlight your hair at home, you might want to register for L’Oreal Haircolor Rewards.
This is a limited time promotion and once you register, just head back over when you buy a box of haircolor. Crack that box open and find the code inside. Enter that into your account and you get one credit.
Once you hit 5 credits, you get a free box of haircolor. They will mail you a coupon to redeem your free box.
There is a limit of 2 codes per month, per account and a max of 2 free boxes per year. Only select products qualify so once you register just check the qualifying products out. I can see 14 different brands- so almost all of them will work.

Sweet! Because I have to use 2 bottles everytime I want to color my hair, so anytime I can get a free one is good!