Alright, so what would I do? Hmm. Well, first off I'd probably freak out and run around screaming for a bit that there were honest-to-god zombies coming to eat us, and that we were all going to die.
Once I'd got that out of my system, I'd change my trousers, and then go find the nearest available car, to find out if hotwiring is really as easy as it looks. If it turns out that it is, I'd then bring it back home for supplies. If it's not so simple, I'd piss about for a couple of hours trying to figure out how it works, and then once I'd got it, proceed to the next step.
That being: supplies. I'd load up on all the tinned beans, tomato soup and ravioli I could find (other things too, but realistically I wouldn't find much), as well as ramen noodles, about eight kilos of rice, and my entire spice cabinet (because really, without spices, what's the point?). 40k-related items get next priority, on account of my intended destination. Then utility items, such as my multitool, a hammer, nails, screws, screwdrivers, wire cutters, et cetera. Large tools, such as the chainsaw (and fuel), the sledgehammer, pry bar, and pickaxe would also be a must.
Then on to proper weapons. I've got swords in both one- and two-handed varieties (though honestly, I'm not really in good enough shape to use the latter to full effect), and a pair of kama that would look quite nice with the business end jammed into some poor bastard zombie's skull. There's also an elephant gun in a closet somewhere, but it's rather old and without ammunition, so that's out. I would of course also have to grab the bullwhip and, for similar reasons, the trenchcoat, because I'll be damned if I'm going to balls up what is perhaps my one chance to look like a true badass.
From that jumping-off point, I'd be tempted to head to the mall, but in all honesty it's probably zombie central, so I might head to the Dragon, my local hobby shop, instead. It's as out of the way as anything, seems defensible enough with its small frontage and lack of a back entrance (as far as I know, but it shouldn't be too difficult to remedy if I'm wrong), and has the obvious advantage of leaving me and any other like-minded survivors with something amusing to do between waves of attackers. Also, it's near several good curry houses, which could be raided for ingredients, and a train station, which seems a likely place for rescuers to show up.
Failing rescue, I'm much too cowardly to go out in true kamikaze style unless there seems to be some productive point to it (i.e., saving a loved one - and for me to die via zombie for them, I mean really, really
loved), but I'm not beyond increasing my level of recklessness somewhat and going out on more active counterstrikes, preferably involving a great deal of fire. I love the smell of roasting undead in the morning. Smells like... victory.
And there you have it - Johnny Grey's patented Zombie Attack Plan, or ZAP (™, ©, ®, all rights reserved, legal gobbledygook, et cetera). Not bad, eh
[EDIT: Minor restructuring.]