Buy the best flashlight models you can afford, and focus on a blend of output and runtime. Variable mode and output lights are more complicated to use, but their power-saving features and different color LED’s may be worthwhile. Lights are useful for signaling anytime there is low or no light, and powerful ones can be easily seen for miles, so don’t skimp on output.
After 9/11, my dad filled a duffel bag with some energy bars, a couple gallons of water, some penicillin, and a map. Amid scaremongering headlines about imminent anthrax and “dirty bomb” attacks in the city, he wanted to have some supplies on hand in case we needed to get out of Brooklyn fast. Were he to assemble such a bag today, he’d likely stumble on a number of companies promising a more wholesale brand of disaster preparedness: a box full of shelf-stable freeze-dried meals, to be revived from their dessicated state with the addition of boiled water.