I agree that food has gone up so much lately, and shopping has never been my favourite thing to do, and also being on my own, it is never worth buying large amounts, as unless I could freeze them (only small freezer too, no space for larger one!) . My best place is going to our twice weekly open market. I take cash - which the stallholders much prefer, and can buy one or two of something rather than a large packet. They know me now from long use and going on my yellow peril mobility scooter. When I am having a bad day they will even get me what I want and suggest things that they know I usually get from them, if I have missed something off my list.
When I have to go to a supermarket, I write a list out and rarely deviate from it, in fact there are times when I dont buy something which has shot up in price.