Doomsday prep

I asked this question in my post on losing data due to hardware failure. I wonder if there’s a good list of best practices every person should adopt to prepare for the most common system failures. For op-sec, non-SMS 2FA seems like a must. For information, there’s probably some back-up system I should be using (please send recommendations). My wife bought us an earthquake survival kit thing.What are the other categories? Which ones are critical for all and which ones are mostly useless?

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