You gotta learn what’s edible. For instance, dandelion leaves are as healthy as spinach. You cook it the same way and season it the way you want. Lots of wild growing things are good for you. Get a book and read up, because honestly, the way things are going, you just don’t know.
I’ve been learning my plants, especially the early spring ones, and keeping an eye out for things like roots and any kind of wild grain that might have caloric value. Cattail roots as an example.
Also starting to seed things out around the place that tend to establish themselves and thrive without cultivation.
On the show “Dual Survival” the barefoot hippied guy Cody had a shirt on: “The more you know, the less you need.”
Another saying he likes is something like “Knowledge - it’s extremely lightweight and accessible in any locality” (or something like that).