Within a month of shit hitting the fan, there will be no food left in stores/etc. if you don't have it, it doesn't exist. You need to live long enough in order to get a crop going. Which means, you need seeds. and water. and know how.
Which is why you should be practicing now. I just ordered my seed package for my garden this year. I have a river/brook adjoining my property, so water won't even be an issue for me. Hunting is an hour's walk away, tops, to 100s of acres of watershed land full of deer/etc.
my food stock is lacking, but for the most part, i'm at least mentally ready for the next step.
I try to never let either of my vehicles get below 1/2 tank.
I want to get some solar things going, even if only small as a back up to charge batteries/etc, but they are pricey.
There's a ton more things I want to get while i still have the chance.