Many people I know have seen shows like Extreme Couponing, and give it a shot expecting to save hundreds of dollars on groceries every week only to end up saving a few bucks. Shows like this can be inspiring, but they don't really give you any good advice, especially for Canadians. I don't know why, but it seems like couponing in Canada just isn't nearly as good as it is in the United States. If you live in Canada, this website/blog is a great resource on saving money, couponing and making money: mrsjanuary.com.
Don't be disappointed. Even if you're only saving $5 on groceries, that's still $5! That's half an hour working a minimum wage job and all it takes is a few minutes to cut out, or print some coupons. Within time you're sure to get the hang of it and start saving more.
I'm not a huge couponer right now, but it's something I want to start getting into. I do use coupons now and then, but often forget. Like any habit, it can be hard to start. I have difficulty remember to bring my coupons, and present them on time! I often don't realize I forgot to give the cashier my coupons until after I've left the store. And don't feel like you are burdening the cashier, or holding up the line. I worked as a cashier for a few months at a very busy grocery store and I had no problem entering in coupons, after all I got paid by the hour, not by how many customers I rang through.
However, I have saved quite a bit of money over the years by using coupons. It's really awesome when you have a coupon for something that's on sale and end up buying it for a fraction of the original price. If you want to start using coupons here is a list of websites to get mail order and printable coupons: