Firearms instructor and survivalist Colonel Jeff Cooper wrote on hardening retreats against small arms fire. In an article titled "Notes on Tactical Residential Architecture" in Issue #30 of P.S. Letter (April, 1982), Cooper suggested using the "Vauban Principle", whereby projecting bastion corners would prevent miscreants from being able to approach a retreat's exterior walls in any blind spots. Corners with this simplified implementation of a Vauban Star are now called "Cooper Corners" by James Wesley Rawles, in honor of Jeff Cooper. Depending on the size of the group needing shelter, design elements of traditional European castle architecture, as well as Chinese Fujian Tulou and Mexican walled courtyard houses have been suggested for survival retreats.
I was brought up as a poor country boy. Our family did all the old-fashioned methods of living. We heated with wood, canned food, did the garden and had a well, killed pigs/hogs, and had a cow for milk and butter. Oh yeah, we also had a two-seater for comfort and had that luxury until I graduated from high school. I still appreciate the information you try to get out to upper level folks. It takes me back in time.
Contrary to what a lot of people think, the most important thing you need to survive a disaster is water. The body can go weeks without food but only a few days without water. And once you start getting dehydrated, there goes your energy levels, your clear-headedness, and your ability to make rational decisions. You will need this gear to ensure your supply of water:
When first getting involved with prepping there is a sense of excitement and urgency. Skills that need to be attained and the gear that could be helpful are continually running through your mind. Many will search the internet for hours looking for informational resources and supplies. As time goes by many preppers begin to slow their pace down. The ...
The government of Prime Minister Theresa May dismisses such talk, but its own ministers have published contingency plans for an exit on March 29 without a deal, and for the first time since the end of rationing in the 1950s, Britain has a minister responsible for food supplies. More ominously, the government has advertised job openings in emergency planning.
There are so many potential disasters that could happen at any moment, and you want to do your best to be prepared for all of them. This list of prepper supplies and gear isn’t meant to cover every single item that you would want to have in these situations (I’m sure blacksmithing equipment would be nice to have but I’m not including that on the list!).
For a lot of us, we are heavily dependant on systems in place to be sure that we have our food in stores, clean tap water, grid power and other conveniences that we’ve come to take granted in our everyday lives. But what happens when we lose those things, say for instance in a natural disaster? What do we do when the modern world switches off? And what prepper gear should we stock to keep those modern comforts?
Obviously, solar panels by themselves are quite useful things to have, and since both Broadwing and Ned in the comments suggested that Goal Zero is quite overpriced, I’d be remiss to leave out mentioning another, more price-sensitive option. Ned recommended Aukey as a brand that makes solar power equivalents to Goal Zero gear for far cheaper. In his words, Aukey “make the exact same thing for a fraction of the cost.”
For global catastrophic risks the costs of food storage become impractical for most of the population  and for some such catastrophes conventional agriculture would not function due to the loss of a large fraction of sunlight (e.g. during nuclear winter or a supervolcano). In such situations, alternative food is necessary, which is converting natural gas and wood fiber to human edible food.
The other thing I want to point out is that there is a bit of redundancy to the solution and resolution of some the listed prepper mistakes. It stands to reason that a mistake doing one thing will overlap with something else, and so, for the purpose of this article, I felt it was important to maintain those small redundancies. Now that I think about that, isn’t that the prepper way?
This idea alone was the reason I started prepping in the first place, it was my experience in a flood that made me realize how much I have taken for granted the systems that are controlled by so many others, from transport industries with food and fuel, to power plant operations and clean water. All of this is daily life norms, but when they are switched off, it’s something I was never prepared to deal with.
A portable, 2.6 pound stove fueled by naturally occurring scraps sure would come in handy after society breaks down. Voila: the BioLite Camp Stove. Feed it biomass like twigs, pinecones, or wood pellets, and the resulting smokeless fire from this portable grill can get a pot of water boiling in under five minutes. It also generates enough electricity to charge a mobile phone or other gadgets with a USB port. Included is a USB-charged FlexLight, a light with bendable stem that can be positioned to illuminate the cook surface.
If the day of reckoning stretches on beyond a few months, however, the ability to grow one's own food will become paramount. Seeds and gardening tools, therefore, should be on everyone's doomsday supply list. Opt for so-called heirloom seeds. These seeds yield disease-resistant crops that produce yet more seeds season after season, unlike hybrid seeds used for mass-cultivated, commercial crops, which can develop into sterile plants.