I woke up this Monday morning and powered on my Mac to check my emails, only to find that it wouldn’t fully boot up. Apparently, an update didn’t install the way it was supposed to, so macOS just gave me an error. After restarting my machine a couple times, I clicked around in an effort to find a solution, and rebooted again. This time around, I logged in and the OS loaded like normal. I don’t know what I did (or didn’t do) to solve the problem, but this was a perfect reminder of a principle that the Navy Seals live by.
Two is one and one is none.
Think about it. You have one computer, which works ninety-nine percent of the time. Ninety-nine percent of one year means that it doesn’t work three or four days out of the year! Speaking from experience, a computer isn’t usually down for just a few days; if it ain’t an easy fix, you may find yourself schlepping it to the local repair shop or calling in your friendly neighborhood nerd—but in the meantime, you still don’t have a computer to use. (Mac users, you aren’t immune to this.)
My suggestion is to acquire a cheap, refurbished computer to keep as a backup in the event that your main machine gets sick or, sad to say, dies suddenly by the Blue Screen of Death. Have a “beater” that gets mission-critical tasks done, at least until your primary one recovers or is replaced. If you upgrade to a newer computer, don’t put your old one out to pasture just yet—it can serve as your secondary.
Oh, and back up all your data in some way, shape, or form. I recommend an external hard drive, but USB sticks or DVDs will also work. It’s also a good idea to back up sensitive information on a USB stick or DVD and place it in a safe deposit box for, well, safekeeping. If your computer’s hard drive kicks the bucket, you’ll still have your data on hand (though I wouldn’t load it all onto your backup machine and potentially slow it down; copy over only what you need), and should some unfortunate circumstance destroy your backup, you’ll at least have your critical data safe at the bank. If something happens to your safe deposit box, you’ve probably got more pressing problems to deal with.
I wrote this with computers and data in mind, but the principle of “two is one and one is none” applies to pretty much anything. Flashlights, house keys, knives, home-defense firearms (unless it’s a revolver or a Glock, both of which should fire on every trigger pull), eyeglasses, good books, and the Bible (the best book), are a few things that come to my mind. Figure out what you own that you can’t live without, and consider acquiring a second of each item.