I was thinking about this too. I’m going to get a fire-resistant box for important documents. The rest is hard to judge as you can’t prepare for every emergency.
Documents : deeds, house insurance, &marriage certs, passports, list of social security numbers, health insurance details.
I’m not sure whether these would need to be on paper or if a usb would suffice?
money cash, bank details,
Sentimental : copies of irreplaceable photos etc on a usb
tools wind up torch, wind up radio, charger, pencil, sharp knife, multi-tool, string, waterproofed matches.
first aid/medical basic first aid kit, prescription medicines, spare glasses
food/water no idea what food would be best, maybe some energy bars? Chocolate?