Even in a worse case senario, grass roots are eatable.
Having a place in the countryside is best.
Knowing your neighbors.
Prepping as much as you can.
Don't have an all-electric home. Propane can be stored for years. So can firewood if kept dry.
Have non-hybrid seeds for a garden.
Learn to can and dehydrate food.
Have some chickens, rabbits, goats, or even a milk cow.
Plant fast growing fruit trees and grape vines.
Have a root cellar.
Learn to trap and snare.
Use a 22 rifle with a 22" or longer barrel with CB's or subsonic ammo, not need for a silencer.
Have at least one AR, AK, SKS, FAL, or other type high capacity semiauto with ammo and spare mags, spare firing pins, springs and parts or have two of everything.
Then have at least one good bolt gun for longer range work, like a 30-06, 308, 7.62x54, or 8mm Mauser. Scoped if possible. Spare firing pins, especially on foreign military surplus guns or have two of everything.
Have a good shotgun. Pump or semi auto. Spare firing pins, springs, O rings on Remi's.
Have a good handgun as last resort.
Stick with common calibers available everywhere, like 308, 223, 30-06, 7.62x39, 8mm Mauser, 7.62x54, 30-30, 44 mag, 38/357, 45 acp, 9mm, maybe 40s&w, 12 and 20 gauge, and 22LR. All others are luxuries. Have at least one of each type gun for every adult, 22's and even AR's can be used by kids.
Learn eatable and medicinal plants in your area. Even Kudzu is eatable, pine nuts, hickory nuts, even acorns if washed several times to make acorn bread.
Have a water filter, know how to make a homemade water filtration system using sand and charcoal.
Have multiple backups for everything.
Learn skills such as carpentry, welding, plumbing, electrial, gardening, canning, tanning. I have seen plans to make a home made refrigerator using pipe fittings, a fire source, amonia water, and an ice chest. Makes ice too.
Learn how to make a steam engine for electrical generation and a heat/hot water source.
Pay off debt, buy beans, bullets, and bandaids before you buy gold and silver.
Have good hand gardening tools as well as good mechanical tools of all kinds. Even old hand drills and brace bits can be used without power to drill holes.
Knowledge is power. Knowing how to do a lot of things can keep you alive, and keep you needed by whoever is in control.
Carry a bug-out kit, bag, and weapon every where you go if possible. Never know when/if something might happen. EMP, dirty bomb, terroist attack, panic in the stock market resulting in a panic in society, hurricane, tornado, earthquake, anything. Never know, and you can't trust people like you could 75-100 years ago, can't trust the government, must trust yourself, family, and close friends.