Don’t go shopping when you are hungry.
Do use farm shops- a sack of potatoes is about £5 and lasts ages.
A chicken does 3 meals- roast, curry and then boil up the carcass for stock for soup.
Personally I buy better but less meat and up the veg and don’t have puddings. Game is cheap at this time of year and really good for you.
I buy frozen fish as cheaper and have a bag of frozen summer fruit on the go as it is fresher in winter and doesn’t go off.
No fizzy drinks- waste of money and screw up your gut bacteria etc