JimmyYoung- A watchtower is about useless but for a fire starter.
They make crappy fire starters. I lived off the grid for many years and the mags didn't burn well as kindling. Maybe it was satan keeping it from burning. (That 'ole devil' trying reverse psychology on me. All those stories I heard of "wordly" books and stuff not burning because of satan. Uhg Lol.)
Keeping extra food stored is always a good idea. I have for the last 15 years, been about 1-2 years of canned food goods ahead. I rotate them in storage as I use. If nothing else it has come in real handy when money is tight.
I also have what I call 'if the fit hits the shan' backpacks. One in the car, one where I live and a couple more in storage. In them I have fire starters,lamp oil, flint, wicks, lighters, lite cookware, knifes, compass,good jeans, thick shirts first aid, medication I take "that gets rotated as well" batteries 'also rotated' as I use them, flash lights, soap, water purifying tablets ect. Always have a windup radio w/ usb that can charge your phone if no power. It sounds like a pain to keep up with but its become a habit now so maybe 30 min a month spend on it at this point. I hardly ever tell anyone anymore because people can associate that with 'crazy'. I just call it being prepared, on an 'If' scenario.
I had cut back actually. I did have enough canned foods for about 4 years but the past few years I've dwindled it down to less. Always keep the 'What if" backpacks in different places.
I suggest also if one lives anywhere near the woods or mountains to buy a book specific to your area on edible plants, you never know if you might need it and its kind of fun, to me at least. It gives me a little piece of mind to have these things.
A family, or even a single person outing with nothing but a 'what if bag' for a few nights in the woods can be fun. Making your own fishing hooks/ lours is easy and fun.
Maybe I lived off the grid to long. It seems woven into me now.