I would see if I could get into a Costco or other wholesale club and wait out the zombies.
I always thought this would be a good place. Its pretty defensible with no windows, solid walls, and a nice roof for 360 degree sight lines. You might even be able to seal the roof, get some soil, and have a little farm up there. Lots of food inside, plenty of alcohol for Molotov cocktails. And I'm sure there is an aluminum bat, which is all I'd need for a weapon. Assuming these are traditional zombies and not virus infected 28 Days or L4D type zombies.
The major problem is lots of other people would have the same thought, if not initially, eventually. So you are dealing with zombies and people. It would turn into the gas refinery in Road Warrior. Although you could use the zombies as a defense wall, and when people come just make a lot of noise to attract the zombies to take them out.
I think the cop and daughter in 28 Days had it right for the most part. Pick a highrise and seal it off. I think the cities would empty out pretty quick, and you'd just need to scavenge from time to time. I would put a boom box on the street, and when a crowd forms just drop Molotov cocktails on them. Just do it over and over.