Three Things You'll Want After a Nuclear War?

What Three Items would you need to survive a world destroyed by nuclear weapons?  I've got a book coming out next month.  It's called 'The Old Man and the Wasteland'.  It's Hemingway meets 'The Road.'  If your a fan of post apocalyptic reads, or play games like Fallout New Vegas or the upcoming Rage then maybe you've got some ideas what three items you might need to survive, and why?  Leave me a comment and let me know.  Then we'll see...