Other than what is going on in my life right now, I would say that what comes to mind is...oh wait a minute, not so fast! Let me back up for a moment.
Have any of you seen the commercial years ago, I think an American Express card with the tag line, "Don't leave home without it!" This refers to the credit card.
The following commercial isn't the best that I've seen; however, it will give you a sense:
Well, for me I use that tag line verbally out loud from time to time for something I consider extremely essential on any given day, whether hot and dry or cold and wet. It is small enough you can stick into a pocket or a purse.
Guess what it is? Oh, you'll probably never guess. It's chapstick! For me, it's of the natural kind like Burt's Bees.
Wouldn't you agree, this is essential, maybe even more so?! ;)