Go the the ant, O sluggard; consider her ways, and be wise. Without having any chief, officer, or ruler, she prepares her bread in summer and gathers her food in harvest. - Proverbs 6:6-8 ESV
Your priorities for survival are linear at a high-level, but become much more fluid as you get into the contextual details of your particular situation.
The 4 main priorities of survival are:
Within each of these four priorities are numerous different conditions that we need to try to handle based on likelyhood. Take shelter for example: the first objective is to have a shelter, this could be anything from a tarp strung up over you to your house. Ok so you have your shelter, check. Are you able to save your shelter from a fire, or flooding, or other people? How likely are each of these events to happen?
Our goal at GoToTheAnt is to give you the tools to determine for your own context where you need to focus your attention. This should not be approached out of a spirit of fear, but out of a sound mind.