anyone want to share good printable coupon websites? Or any advice on how to become an "extreme couponer?"

Many on those shows also buy their coupons from clipping services and eBay. most printable online coupons will limit you to two of each, (unless you use more than one computer).

Get yourself a Twitter account and search for those who look for coupons and special deals everyday. Follow those people on your Twitter account. you can then check just one site instead of searching for hours everyday yourself. many of the offers will be gone very quickly so check your account several times a day. many manufacturers post special coupons and deals on their websites and Facebook pages.

I have listed a handful of twitter accounts I follow and a few others. And because civilization can't exist without Moon Pies I've linked to their coupon deal as well.

First FYI, these people spend from 20to 40 hrs a week getting all there stuff to gather to shop.
They get their coupons from many sources, one being the newspapers, they use as many repeat coupons as they can whether they get them from neighbors, trash, wherever. also they to get many online... just google coupon and more sights than u can imAgine pop up, beware, they all want your email and will fill your box with more than you want. These people also use their saver cards (some stores issue these) if you register with them. Last, but not least the way that the really get these deals is by going to stores that do double and triple coupon days. they use all of these coupons by purchasing stuff only that is on sale. this is how they eliminate all of these cost. if you do look at their carts though, they are not buying everything that you would normally need or buy on your shopping trip. Much is an over abundance of god know's what. Plus they are on tv and get incentives that way of course.

groupon and social living. you pay for those though and get lower rates at the stores.

On the show extreme couponing, where are the shoppers getting all of the coupons?