What's your plan when the zombies are actual undead?

So... They come at you, you despatch them by cutting their head and arm off... But they get back up, headless, and their severed arm starts wriggling towards you. Kind of like the zeds in Return of the Living Dead, but shambling and unintelligent. Chop up a zombie into 13 different bits and you have 13 different pieces of undead, untiring anatomy crawling towards you...

You wake up and everyone is infected but you, and you don't know what caused it or how widespread it is.

And it's not just people; cats, dogs, birds... They're all zombified.

How does this change your survival plan?