Head on over to Recyclebank and take the "Green Your Vacation" Challenge. It will earn you LOTS of points that can get you free coupons. (And nice ones, too!) If you haven't already created an account with them, click on the link and create one. You will find coupons for great items such as Coca-Cola products (how many of THOSE have you found?!)
P.S. - While you are there, click on the "mini" questions along the right to earn 5 or more points instantly!