Can we list useful skills for preppers to learn NOW

[Hrusai]

i think extracting useful products from nature is one of the best things we can learn to do really, if we need to make toothpaste we'll need sodium bicarb, so knowing natural sources of either it or its precursors will be valuable information....hell even simple things like you boil sea water to get sea salt, you'd be shocked how many people dont realise that xD

also things like making jerky or dried salted meats things that are relatively easy to make, have high nutritional value and are light and long lasting, thats exactly the kinda food skills a prepper needs