If you're still waiting, don't. If you're relying on weapons, don't. Get in shape now, and watch this Discovery Channel show. One guy on this show has lots of guns, but also sports a large belly, which will slow him down tremendously on foot. Don't wait--Train now!
Russ Craber, MBA, CSCS, has always been concerned about a post-apocalyptic zombie scenario, and can train you for optimal living after the inevitable occurs. You would be well-advised to heed his advice.