Stored in your car, the Third link is your GHB. By definition the GHB provides up to 24 hours support staying in the car, walking home, or traveling to other cached resources.
Stored at home, the fourth link is your BOB. Also know as a "72 Hour Kit" The Bug Out Bag provides for complete personal support over 3 days. This includes water, food, clothing, shelter, medications, first aid, and sanitation. It is portable should you need to "Bug Out."
The first link in your survival chain will always be a plan. You need to articulate how you are going to respond to a wide variety of limitations caused by a disaster. Share the plan with you family.
The second link is your EDC. I have defined this as the minimal gear necessary to allow me to egress from buildings and affected areas. The items are small and easily fit in a purse, bag, or pockets. The EDC helps me get to my next link...The Get Home Bag in my car.
Bug Out Bag
Every Day Carry
Get Home Bag
We need to understand that our disaster survival depends on what resources we can bring into play at any moment in any given location. Since it is impossible to carry all of our resources with us, we need to view our preparedness in a way that allows us to move from moment to moment and location to location. Consider how the concepts below would allow you to fluidly move from resource to resource. Details for each one of these links in the survival chain can be found by clicking on the teal links in the pictures.
The examples listed below are not intended to be definative or exhaustive. It is merely a representation to help you understand your survival as a linked system. While your chain should and will be different, It would most likely include many of the following links.