Couponing

So theirs this new show on TLC and its called extreme couponing and I was so amazed by the show that I started to clip coupons but unlike those fanatics I only saved 10$ not much considering my grocery for the month are like 300$ and those people are saving more than my entire bill. Is their anyone out there that could explain to me how these people manage that. All the coupons I get are not worth a lot and expire quickly so its not like I can wait for things to be on sale. It just doesn't seam realistic to me. Is the show fake?