Lots of ammo, gas and napalm charges. LOTS of ammo.
Popular Mechanics takes a look at all of the zombie movies out there and give you the pointers that could save your life. In the future, of course.
AS PM puts it:
...if you're ever caught in a post-apocalyptic nuclear fallout crawling with zombies or run by apes, you'll thank your lucky stars you read the lessons here.
Even WIRED got in to the mix last year helping you decide the best way and methodology to take down an approaching zombie hoarde. Of course, it pays to be prepared early on. Don't let your compound get overrun.
It could save your life.