I've been actively couponing for about 2 months now. My grocery bill for 3 adults (myyoungest son is 17 and certainly eats more than his dad) has averaged about $75/week.
It takes some searching but I've gotten coupons for $2-$5 off my produce purchase from my local grocery chains. Coupons for $10 off a total purchase of $100 or more (also from the same stores) which can be applied to meats, fish or produce.
I've gotten Facebook coupons for whole grain breads, pasta, eggs, bagged salads and bananas.
There are printable coupons out there for soy milk, berries, various cheeses (not the processed stuff), coffee, creamers, and tea.
I've found coupons for various types of sugar, salt, flour, spices and seasonings, butter and margarine, half and half, and canned milk.
My shelves are stocked with olive oil, vegetable oil, catsup, mustards of all kinds, pickles, relishes, soy sauce, worcestershire sauce, salad dressings, mayo and hot sauce. All of them were either free or only cost me pennies after coupons.
Today I used some Catalinas for $X off your next purchase which I got from my last grocery run. My cart had only fresh produce in it and after coupons it totaled just under $40. Once I applied my Catalinas, I walked out of that store spending less than $5 OOP!
It takes some work and following a few great couponing blogs to get those prices down. Then it takes some good reliable recipes to make what you buy work for your menus. But we're eating quite well, more homemade stuff than ever before and spending a lot less than in the past.