When it comes to kitchen equipment, most people are focused on cookware and knives. Those are indisputably important, but they can sometimes distract from one of the most useful things in any kitchen: a salt pig. That's just a goofy name for a large salt cellar, and if you don't have one—and maybe more than one—you should.
Salt is the single ingredient we use more frequently than any other, and we often season whatever we're cooking multiple times in any given recipe. It needs to be within easy reach at all times, more so than oil, vinegar, pepper, or anything else we're likely to routinely grab.