I’ve just made a Dorset apple cake and apple crumbles with a load of free apples, lots of people around here leaving fruit out to help yourself. Take advantage of any freebies.
Go shopping in the supermarket around 7pm, or find out what time they do their reductions. There are usually great bargains, loaves and bread cobs for around 30p fish, chicken, fruit and veg etc, you can freeze most of it and make soup with the reduced veg & then freeze. Also try more supermarket own brands, many are just as good and much cheaper.
Check out charity shops or car boot sales for things like candles, books, jigsaws, craft items etc. lots of people get given candles for presents and send them straight to the charity shop. I’ve picked up some really nice candles and craft items for next to nothing. You can re-donate the books & jigsaws when you have finished with them.