I will jump in here with few points.
Few times I had to run in “5 minutes notice”, and interesting thing that happened that (especially in starting period of SHTF) I performed very bad, in a way that in 5 minutes I failed to prioritize what is important to carry, and what is not important.
It is simply because we have so much “important” things around us, that belong to us.
What is most important?
Your own life!
And means to sustained that life.
If in future you are going to have only 5 minutes to leave your home, without clear plan and proper “training” you will fail to perform on a good way.
In worst case you will die trying to save your belongings (to carry it with you) or in better case you will take with you stuff that is not important.
So it is very good excersize actually-what will you carry with you if you have 5 minutes warning, where is that in your house, how will you organize other family member etc.
5 minutes is very short period, especially if you are under lot of stress.
I have seen people getting shot because they spent additional 2 minutes trying to lock door (in time when locked door do not mean anything to anyone), or in other case i have seen lady shot dead, because she could not run-she carried (while running from her house) sewing machine, which was practically worthless piece of garbage in the world without electricity.
Habits, and valuing things can be good, when SHTF try to make new list of values and priorities.