One person's opinion on how to handle an immediate crisis.
You can disagree with some parts of this (I do), but the overall plan makes sense and I advise incorporating this into your own prepper plans. You may already have a "command structure" in place and not need to spend (waste) time establishing a "pecking order" in your group / family.
http://www.survivopedia.com/blueprint-for-three-days-to-prep/Remember, you might have Much less time than this hypothetical scenario... Including NO time at all.