Well as I've read from the Zombie Survival Guide *AWESOME BOOK* I would hold up somewhere like a shopping center where I have ammo, guns, food, water, shelter, tools, and generators with gasoline and battery supplies.
The best weapons to use are the ones that are long or mid distance, to actually use something like a chainsaw is suicide because you'll get infected blood all over you and chainsaws run out of gas quickly. The preferred weapon would be something like a jade or something that has a blade on the end of a pole kind of design, anything that keeps you and a zombie away from each other while being able to sever the zombie's brain when attacking.
Another thing is something like machine guns are no good against zombies because it's just a quick waste of ammo and bolt-action or single shot because they are too slow in times of when being attacked by multiple zombies, as the only way to kill a zombie is by decapitation or destruction of the brain by any means necessary. A semi-automatic weapon that acts as a rifle with a large clip such as the M16 or AR-15 would be best suited for a zombie invasion gun-wise as ammo is easier to come by and more of it can be carried.
A sanitary food, water, and waste area is necessary to avoid infection. Avoid zombies at all costs, do not stay in a "closely fit" area where there's barely any space to move around as there is a low chance of escape if over-run by zombies.