Solar panels and the parts to build a hydro generator, then. A hydro generator would also be good incentive to plan around a reliable water source, without which all bets are off anyway.
Some part of my brain filtered out nuclear winter, which cannot reasonably be prepped for by individuals or small groups. However, that is just one, relatively unlikely, thing to prep for. Most other disasters are shorter-lived, and have a great deal of overlap in effective mitigation strategies. Prepping, in my mind, is not only practically useful for various classes of emergencies, but is good mental exercise for understanding supply chains and what's actually needed in the sort, medium, and long term. It can also be good for sharpening skills that benefit others and build community, which in many ways is more rewarding than knowing that you'll be the sole survivor. Prepping doesn't, and shouldn't, look like Burt from Tremors (as amusing as that may be).
I'm being a bit glib anyway; call it gallows humor to help me process currents events. Even worldwide, long-lasting nuclear winter must passes & settle eventually, and such sunlight-enabled microfiche files could be useful to subsequent generations if not earlier.
Fellow survivor on a bicycle which powers a lightbulb by which you can read the microfiche. Voila.
For anyone who never watched the original Soylent Green movie, it's worth a rewatch because it actually shows a future where people are having to make do without a power grid in cities, by doing things like riding a stationary bike hooked up to a generator to power their TV or radio long enough to get some news.
