My brother and I talk about this sometimes, lol. We've decided to get into his apartment (it's better than being in a house when the zombies attack, cos it will take them longer to get to you, and there's also safety in numbers), cut off the elevators, bring as many canned food as we can, and have kitchen-knives ready. XD And I *think* we were going to fill up the bath-tubs, sinks, etc, w/ water in case they cut off the water supply, so we'll have water to spare.
Lol, I'm such a nerd. But at least I have it all planned out in case they do