I tried the couponing thing for a while, but I found out I just don't buy enough groceries to make it cost effective -- or time effective. I like a good deal as much as the next person, but unless you're buying stuff for kids, couponing really isn't a good use of your time. Most of the really good deals are for diapers, baby food and other kid-related items, or for stuff I don't use. I figured I wasn't saving money if the coupons weren't for items I don't buy anyway.
That's the secret to effective couponing: you have to be a shopper who buys a lot of brand name items and you tend to buy what retailers release coupons for. Otherwise, buy the store brands and save money.
And yes, the couponers themselves are a little crazy. I went to one of those couponing workshops, and those women scared me.