This is some of the best adviceMy outlook is to first get yourself all set to live with everything shut off for 10 days straight. Food, water, power, etc.
Imagine everything goes BOOM. Can you continue more or less "normally" for 10 days? If the answer is yes, then work a month at a time outwards from there in terms of planning. What tools do you need for when the stored food and water runs out? What processes do you need to implement?
The goal is to have everything as normal as possible for the first 10 days of any kind of major incident so you can remain calm and begin implementing your longer term plans right off the bat. You can already begin to establish the new routines you'll need after the 10 days. You'll be WAY AHEAD of everyone else, because you won't be panicking and forgetting what to do. You'll be calm. Very important. Fear is dangerous, and panic is a death sentence.