I’ll keep it short (your time is valuable) and recommend just a few (but important) specific products for general purpose preparedness.
There’s so much more, however this will set you in the right direction.
PURE CLEAN DRINKING WATER!
AT LEAST 30-days/person
AT LEAST plan for several days
Kaito Emergency Radio
Portable Butane Stove Burner (Safe Indoors)
Portable Charger – Cell Phones, etc., 3 USB Ports
Headlamp Flashlight (Most Popular Choice)
Indoor-Safe Portable Propane Radiant Heater
Cutting, Combustion, Cover, Container, Cordage