I'm happy knowing that if people think I'm crazy, it won't bother me. I know that real crazy is knowing something may happen, and choosing to do nothing.
Last month, I set-up my home-made "Faraday Cage". It's a simple solution to a hideous possibility.
In the event of an EMP (electro-magnetic pulse) attack, any unprotected electronics are vulnerable, and most will be rendered inoperable. The solution is to protect what you can. Your car, large appliances and even your home wiring will be fried after an EMP. Some electronics may or may not survive, based on the distance from the blast, their individual robustness, and luck.
I used a standard steel trash can, and lined it with regular thickness cardboard. The EMP radiation acts like radio waves, and can easily be deflected (fine metal mesh even works). Insulated in the can, items are safe. I filled the can with flashlights, radios (AM and 2-way) rechargeable batteries and a pedal recharger. Some people also place notebook computers / pad, cameras and back-up drives in there as well. The idea is that after an attack, you have some basic supplies until the infrastructure can be repaired. Is this over-the-top and alarmist? Perhaps. Is it also easy and prudent? Definitely.
Next, I'm buying a small plastic trash can, a bag of rice and some dry ice. The CO2 from the dry ice will displace the oxygen in the can, keeping the rice from spoiling (no oxygen = no bio growth). Even if vermin get in, they suffocate and die. And, the lid can be removed safely to check on the rice without needing to reseal. The CO2, heavier than air, will remain in the can unless actively stirred-up. And, the CO2 will not affect the taste or quality of food.
The K-Tor brand charger and the rechargeable batteries were the most expensive items. The rest of that stuff is cheap. What? You can't afford trash cans, cardboard or dry ice? Maybe you're afraid that if your friends knew what you're doing, they'd look at you different. Maybe you shouldn't care what people think, and just do the prudent thing. Just sayin'.