Living on an upper floor comes in handy for once, as it's actually fairly easy to barricade the front door. Alert some key close friends and family members who will actually believe me. Then stock up on canned goods, fill every possible thing I can with water, and grab some camping solar kits for power once the grid goes down.

After that? Hunker down. Avoid being clearly seen in windows or heard to prevent attracting the undead. I reckon I need to last about 6-9 weeks.

See, the thing is, zombies are going to die out. The average human can go 3 days without water and 3 weeks without food. Let's assume zombies have a magical lack of need of hydration, so they last 3 weeks. Double that for the time they'll have ample food. Assume another 3 weeks that they'll cannibalize each other or something.

At that point, I can begin to venture outside. Small numbers of capable zombies may still exist, but most will be dead or starving. Other survivors are my greatest worry.