I look at awe as they use literally hundreds of coupons. There seems to be stacks and stacks and stacks of them. The programme shows them literally getting hundreds of dollars off their bills (although I believe there are suspicions about sharp practices at times) There isn't the same coupon culture over here, but I looked at the MSE Extreme Couponing page to see what I could do.
You have to do the sums. If I go physically to a supermarket then I need to pay £6.30 in bus fares and I can only buy what I can carry back on the bus. If I get a Tesco Delivery pass I pay £6 per month and all sorts can be delivered. Tomorrow I am getting four packs of the 40 wash size Ariel delivered with my groceries as it is half price at £5.50 instead of £11 and according to mysupermarket.com that is about as low as it gets. I think it only comes around every six months or so, and I was finally running out from last time. I would struggle to get those big cartons on the bus. I am also having problems getting out the house so to be brutally honest I don't think I could do it.
On the other hand, most coupons seem to need you to be present in the shop.
I think I will have to work on it. In the meantime I have eight episodes of Extreme Couponing saved on the tv and I plan to sit there with my knitting and enjoy!