Let your imagination run wild!
I make my own laundry detergent, use vinegar and bicarb for all sorts of cleaning uses and shampoo. Citrus peel added to vinegar makes a nice citrus cleaner.
As far as food goes, you could probably pick a cuisine and copy e.g. Italian families ge together to make tomato sauce/passata, salami and other goodies.
I make my own bread, and am learning to extend/preserve my own home grown produce by blanching and freezing, pickling or making tomato sauce.
I also make my own yoghurt.
I don't have fruit trees, but when fruit is v cheap I buy a heap and make jam.
There's heaps more I want to explore e.g. cheese making, soap making, water bathing, pressure canning.
Once you get used to making your own stuff, things you buy seem icky/inferior/fake/full of chemicals