Not that much to it, really. Edible plants can easily be recognized by the fact that they grow together in square tracts of land known as cropfields, which are usually located in rural areas. Mind, you`re not to eat the berries of potatoes. Surviving on 'fresh' food is mostly a matter of knowing how to store it. Cabbages - which stay alive for quite a while, consuming their outer leaves to nourish the heart - and carrots - which can be stored between layers of sand for months - are easily recognized by most consumers.
Meat isn`t that hard to obtain either. In fact, I fear there may be too much of it. All that uncared for cattle...
And who needs bow and arrow anyway? Overvalued as hunting weapons IMHO. You can hunt waterbirds by throwing sticks at them, like the ancient Egyptians did. (I`m not sure, but the slower, but twirling, stick might be harder to dodge for a bird than an arrow moving in a straight line.) Any selfrespecting birdcatcher would use nets, though. And, hello, fishing?
For canned food and the like, don`t bother with your local supermarket, nor even the really big malls. You want the supermarket supply centers that are located on the outskirts of town. They`re easily accessible and have way bigger supplies.

Actually, the first thing I`d really do in the case of any apocalypse is to grab my travel bag and find some higher ground. It`s unhealthy to live below sealevel when nobody is maintaining the dykes. I`d stock up along the way, trying to find transportation in the form of a cart-bike: easy maintenance, no fuel problem, and low noise. (Plus, I can`t drive.) After that, I`d probably try and find some orchards and some beehives, bee- and orchardkeeping being the only foodproduction activities I know anything about. I fear the worst, though. Bees have been infested with an Asian parasite in the last years, and without proper care (including such man-mades as anti-parasite chemicals and/or drone-cell waxplates) most populations will die out within three years. Since bees are the main pollinators of many fruitbearing trees, but also of such crops as beans, harvests will become even  more meager than most here will have anticipated.

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IRL: Edwin Hofstra

- mostly crewing at the moment

I will second that, there's nothing worse I can think of than being buggered by a load of nu-skool zomerz, better shoot myself now than suffer a sore arse as well as becoming undead...!

^{There is no way you can disprove to me that all reality we percieve, was concieved in the mind of a plastic troll. Now hand me my pills.}

We have huge amounts of canned food, and an insane amount of camping gear.

If you can't beat 'em, find a way to blow 'em up.