http://www.nikwax.com/en-us/webquiz/index.php -take the quiz. You have to get the questions right, but you can take the quiz again. You can do the quiz every 3 months. These do take a while to come, but if you look on the What I Got page you’ll see that many people have been getting them for years now.
Many Walmarts have these for $1 each, making them Free with the $1 off Slim Fast coupon.
http://www.rougemag.com/en-US/Pages/Register1_Secure.aspx -this magazine has coupons which are often used in the Free Stuff Times money page posts.
http://www.hostgator.com/sticker.php -you have to tweet about hostgator