I try to find as many sample opportunities to both the US and Canada as well as worldwide. Here is a great coupon site available for residents of Canada.

Save.Ca offers tons of great product coupons for all types of grocery items. It is a free service for everyone in Canada. They allow you to choose and receive grocery coupons of your choice. Select the coupons you wish to use. The coupons are then printed for you and sent to you the very next day. The coupons are redeemable at supermarkets nationwide, and its all free!

For those who are interested in the website, they currently have a free coupon for LiveActive Kraft Cheese with Probiotics. Looking on their coupon page, you can save tons of money.