Jaycee hit it on the head. By getting paid to take away cleaning items, this frees up money for groceries. Also, it use to be that you could use your Wag's dollars at certain grocery stores. This was big. I would go into Wags, walk out with tons of super cheap stuff, and then take my Wag's dollars to Jewel and buy meat and produce. I could take $20 bucks and get $80 in stuff. The Catalina deals at Jewel were amazing, though they've slowed down. Two xmas's ago, for instance, if you bought $100 in Gift cards, you got $20 towards groceries. I bought 1k in gas cards (hubby spends $300 a month on his commute). It was terrific! A 20% discount on gas is giant! There hasn't been a really great gift card deal in a while. Last year I did buy 1k in Lowes cards since we were planning on buying a snow blower. They do these deals at Thanksgiving, and then in May for Graduations/Mother's Day/Father's day, etc. Couponers are big fans of these, since they can buy GC to restaurants, and then get $20 towards groceries --this allows you to really extend your money.
Target is a good place to use MM (money makers) to buy produce. Frequently they have terrific stacks, where they are paying you to take things away. Sometimes these are real money makers, where you are earning money on the product. You then use the surplus money to buy produce.
I honestly stopped doing serious couponing. I just don't have the time, and it isn't really worth it. I am currently stocking up on free hand lotion. I will do these sorts of things from time to time, but I just don't have the time to run from store to store to store. It's a full time job, and the $200 in savings isn't worth it to me right now. I use to spend anywhere from 2-5 hours a week to save a few hundred a month. Just not worth it to me right now.
I throw out most of the coupons I get (i get 4 Tribunes on Sunday), but occasionally, there are some terrific coupons. For instance, in a few weeks there should be a $2 Finish coupon. This will allow you to get Finish for FREE at Wags and Target --they've done this deal the past few xmas's. Right now Target is all about lotion. Lots of freebies. Things run in cycles, so I know when to look for certain coupons. A good deal on Kellogg's cereal should be coming up too.
But I'm like you: I cook almost everything from scratch. But the savings is in the "other stuff" ---free cough drops, free razors, free toothpaste, etc.