Fishing, foraging and if things get really bad, small scale trapping, and if things came down to that, I'd sample the long pig (not hunt them, but if opportunity would present itself...)

1. Extensive fishing kit:
Including but not limited to:
Several rods/hand-lining bars, several km of fishing line, a few hundred hooks, spinners, various styles of those rubbery things I don't remember the English word for and so on.
Prawn nets
Crab pots and other fish traps, several collapsible (rather fragile kinds), plus a few chicken wire ones.
Small drag nets
Spear gun + snorkelling gear

2. A few decent books on edible plants (local, general European, a few with more global scope but naturally quite limited), plus tools for the task (pretty simple, knives, saw, buckets and plastic bags).

3. Lots of seeds and a (very small) hydroponic growing system + lots of pots with herbs and similar. Some of it's pretty quick growing, (sprouts in 2-3 days, some greens in 1-3 months and the rest 3-8 months).

If feacal matter would really hit the fan, I might retire to a uninhabited island and try farming a bit, or at least planting a few low maintenance plants there in the hope of returning after a while. This would be from 3 months to a year from date of plantation, so a pretty long term solution.

4. If really desperate, small scale trapping (rabbits and smaller), throwing sticks, arrows (maybe, I'm not very good at it)

All this would depend on having some sort of warning beforehand, and the right season (I live in a boat, currently moored in Finland = trapped in ice/lifted from water for about 4-5 months a year).