Five years ago I posted this advice on my Facebook page.  It has profited us greatly during this lockdown .  We haven't been to the grocery store in 2 months but we have been to a small mom & pop market & the Dollar general  for things like dog & cat food, dairy products, junk food and things you can't make.   here's what I posted  5 years ago:   
     
       I would STRONGLY suggest, with the greatest of urgency, that if you have not done so yet, this spring and summer you either raise or purchase your produce and learn to can it. (Freezing is good, but if the electric goes off for any amount of time it will thaw. )You can still can on a propane grill if you need to pressure can and a campfire will allow a boiling water bath enough heat to can high acid fruits . Lawns are nice, food is nicer. You would be amazed at how much will grow on 1/4 acre. Buy bread flour and All purpose flour.It freezes nicely ( to keep summer bugs out).What do you use flour for? Italian bread,whole wheat bread,rolls,cookies,pita bread,rye bread,pies,cakes,macaroni, spaghetti,fettucini,stromboli,pizza,every kind of pasta( buy semolina flour to combine with white flour to make pasta. It only uses small amounts as compared to the ratio of white flour).Look at EVERYTHING you use on a day to day basis.If you stocked up on different flours,yeast (get the freeze dried 1 lb brick that Fleishman's sells),rice,dried beans and split peas (to make soups and chili).A fugitive in Yugoslavia said he wished he had toilet paper stocked up because of his war torn zone.Always keep seeds and have seed potatoes.Do you have a SHORT WAVE RADIO ?? They are cheap to buy. Get the hand crank one. I have a hand crank flashlight in my car that still works GREAT after 8 years. Get one of those also.Being a prepper is not an off the wall anxiety state of mind. It is being realistic with the possible situations confronting us.The "grid" collapsing is one of them knocking out all electric and computer access.We immediately return to the 1800's but unprepared.

You don't need semolina flour to make good pasta. All purpose flour is great.  You also don't need a farm or a lot of acreage . A trip to the supermarket and ask for a crate of corn when they go on sale,  Then can or freeze it,You can buy "seconds" at fruit stands.  Tell them you are looking for "canners".... tomatoes, peaches, etc.  Start your tomatoe plants on your window sill in egg cartons. Then transplant the end of May.