She lives in our area so I've followed her blog on occasion. She does lots of trading for coupons and has gotten to know managers well enough at some stores that when things go on sale they will order her mega amounts so she really stocks up.
She also takes coupons of things in stores that she doesn't purchase, those sticky peely coupons. It's just a personal issue for me but I have a hard time taking those.
Also she does lots and lots of online reward sites, ebates, She puts a lot of hours into her efforts. Which I am sure is very rewarding for her but not everyone has that much time.
I've gleaned a few great things from her site but leave the rest.