Knowledge, creativity, allies, discipline, sanitation, and water are what most people will find themselves lacking.
Sorry dTube isn't loading for me so I can't actually watch :(

Hmm when I started playing a youtube video dTube knocked loose.

Anyway prep the most common historically, as well as the most likely scenarios for your area.

Gahhh!! that lag was atrocious.
Anyway it's imperative not to get tunnel vision, and it's better to invest in you ability to MacGyver things than it is to have a stash of 100,000 rnds.