Maybe it's just the places where I eat, but restaurants seem to be putting less and less salt on their food. If you're not home, it's a bit of a problem if you find yourself low on salt : lethargic, nauseated, having a headache--kind of like having a cold, but without the congestion. What to do?    Grab a bunch of salt packets at fast food restaurants.   Get a personal salt lick . Weighing in at five to seven pounds, it can double as a free weight and a weapon that would sail through TSA inspections.  Sears, of all places, sells salt pinch tins .  My choice is a pump salt mill  produced by Vic Firth. It's the size of a small flashlight and heavy for its size. It'll fit in a small purse and it doesn't look like it would leak or get caught on anything.    
Do-it-yourself health. Low-carb, mostly evolutionary.