Salt has many other uses eg. a salt soak relieves tired feet, and can also be used in body and facial scrub lotions.
It is said that local medicine-men use coarse salt among other things, to drive away evil spirits but I myself have never seen this being practised.
And it seems that to keep rain at bay when holding wedding feasts or gatherings outside, some people swear by placing a bowl containing some salt and onions in a corner of the house somewhere high like on the roof. You'll see clouds gathering but no rain falls until the event is over.
Maybe faith has a lot to do with that.
On the practical side, here are some uncommon ways you might make better use of our common salt other than the standard pinch or two in your cooking.