There is one thing I have never heard preppers talk about, and that is salt. You cannot survive without it. It preserves food, and when there is none to be had, it will be right up there with clean drinking water. In places like Appalachia, where there are no natural salt deposits, salt will be priceless. Roman soldiers used to get paid in salt, that's how valuable it is. I discovered that Morton Pool Salt, in the blue bag, is pure sodium chloride, with no additives. I bought 7 40 pound bags, for about 9 dollars per bag. It's put away in deep storage, just in case.