[loa_in_]

Apart from the logistics, you can prepare yourself mentally for the worst.

Get to know limits of your body while you're in the clear. You heard you can go few days without food, but I highly recommend trying it out.

Practice critical thinking skills. Always be on top of your game. Your mind should be at capacity all the time. Be vigilant on but the laziest of days. Make up something if need be.

Be dependable to yourself. Avoid alcohol, drugs. Teach yourself to get back up reliably and fast. True fear will knock anyone off balance, but some regain composure faster.

Listen. A lot. However you might feel about it, if something happens, unless you're getting teleported away somehow, the world is still going to be there. People you care about, and those you do not. There's no social comfort zone, better rip the bandaid early. I'm yet to meet a person that's unimportant or inconsequential.

Does this sound awfully like work? Good. Plan your downtime and enjoy it as if it was to be your last, as you should anyway. You'll never regret truly living.