Yay, Anna!
A couple years ago, I started keeping track of our grocery expenses and putting them in "food/nonfood" categories. I decided to determine which was which by looking at the receipt and seeing if it said "food stampable" or not, since I use some food items (coconut oil, castor oil, sweet almond oil, white vinegar, apple cider vinegar, cornstarch, baking soda, vegetable shortening) to make cleaning and/or personal care items. "Food stampable" seemed the simplest way.
I came to realize that our food budget was low- very low. $25/week in the summer, $50/wk in the winter + $50 per month at the restaurant supply store + big bulk purchases ($70 per case of butter 2x/yr, $150 per 12 chickens 3x/yr, $300 per half steer 1x/yr, $300 per half pig 1x/yr, $60 at the strawberry Upick 1x/yr).
(We are me, DH, half time DSS 13, DD 5, DS 2.)
What was kicking our butts was non-food consumables. We use cloth for most everything and I make all our laundry, cleaning, and personal care items except for dental stuff, contact solution, razor blades, handwash dishsoap, and Magic Erasers. I still had to buy borax, washing soda, generic oxyclean, lye, essential oils, minerals for sunscreen, glycerine, first aid supplies, office supplies, canning and freezing supplies, hardware items, toilet paper (we use family cloth for pee, but you still need TP around), OTC meds, pet supplies... you get the idea.
I never thought about couponing since we don't eat fruit snacks and TV dinners, but it hit me over the head recently that I could coupon *just for non-food*, so I started this recently and IT IS WORKING. (Okay, okay, I bought some mustard with coupons, too.) I've spent $100 on non-food since Easter, which is close to normal, but I have gotten so much more. We have at least a year's supply of TP, toothpaste, toothbrushes, contact solution, first aid supplies, Magic Erasers, Ziploc bags, allergy meds and ibuprofin. I need to get razors, Qtips, trash bags and dental floss this week and then I won't need to go to the store until Thanksgiving, which makes me so happy because I hate to shop.
I also learned how to hack Brita filters, and we switched to wood heating pellets for cat litter. Oh, and we gave up mouthwash, we just use peroxide now.
Just thought I'd throw this out there...