Interesting tips, thank you for sharing them
What I've found useful while trying to save some cents is to bought bigger amounts of food all at once. For example we usually cook for 3 days.
I've found also some bigger stores to be cheaper and useful. Moving from local small stores to Lidl (could be a bit similar as your Walmart I guess) we've managed to save nice amount of money. They have often things on sale and for example a litre of milk which costs 99c in other stores costs 75-79c in the said store, permanently
. A litre of yoghurt 89c against a litre of yoghurt €1.50 - 2.0. They do also that coupon thing.
I find also freezer being useful while talking about groceries. Once you find a good sale stuff, you can buy more, put it in freezer and it'll stay edible way more longer. Our freezer is full at the moment too.
I've also found cheaper 'all around' brands being as useful as more specialized, well-known brands. For example sanitary pads: one of our most chepest 'all around' brand (X-tra) around 89-99c, one of the most leading pad brands (Always) around 3 euros. Both of the packs include 14 pads. Tho I've some brands which I've accustomed to and which don't want to give up.
We (2 people) spent approximately 200euros for food and other daily stuff a month-two ago. I have counted our consuption during the last month yet but guess it's something around that too or maybe even a bit less. And we've still kept eating full, good meals and buying daily stuff that we've really need.
Oops... I guess that this went a bit offtopic. Back to the topic now