Well, I recommend, at minimum, "I Walk the Line" and "Ring of Fire: The Best of Johnny Cash", but don't forget his other works, such as "Bitter Tears: Ballads of the American Indian" and "Orange Blossom Special".
This should get you through any Cash crisis.
Didn’t he do the one about the ragged old flag? Everyone should have that one, as well.
You are soooo screwed.