Prepare your body and mind. Learn skills. I learned lots of survival stuff. Learn your environment. I don't prep myself(food wise) but I've got enough tools to rebuild of needed. Food goes bad, a well taken care tool does not.
Ive had a few ideas.
Tough Mudder registration, participations, and completion.
Black Belt completion in a carefully chosen martial art or MMA.
Take a Military Science course or two at the local university.
(Im Epilieptic, so even though I tried signing up for the Armed Forces, it was a no go for me.)
Take a Law Enforcement Training Program, practice marksmanship.
Take up hunting deer and small game, including birds, have a bird dog.
Explore my area well, at different times of day and night, know danger spots and alternate routes.
Establish a warehouse, put a locker room and bathroom in for safety and sanitation purposes.
Establish vertical farming for fruits and vegetables seeding daily, and harvesting weekly.
Have trucks ready to deliver pallets of food to churches and hospitals.
Using the raw food growing license and a trust fund, establish it as a business and hire.