I was just reading "15 Things You’ll Regret Not Having Enough of When SHTF" from askaprepper.com, and Number 4 is Salt.
I like reading articles like this. Of all the things on the list I would probably want the salt. As far as the prepper or homesteading angle, I'm thinking yes have a storage of a few foods and supplies but better to know how to grow, build, make goods rather than plan on eating or using from a stockpile forever. Basic medicines, antibiotics, beans, rice and a way to treat water supply. I have three ponds and a well on our property. Right now I'm thinking filtering the water throw cloth, boiling it and running it through our Brita will do the job as far as taste and health. But of course you need a place to cook and have heat.
If anyone wants to read the entire article, it can be found at: http://www.askaprepper.com/things-regret-nothaving-enough-when-shtf/