My house's windows have iron bars (kinda), so we don't need to board them up.
my door is as sturdy as a rock, so we don't have an issue there.
i have katanas my father brought from japan years ago (they're blunt, but with the right tools and practice, I can become Uma Thurman in Kill Bill), so we don't have trouble in defense.
what i'd do:
1) modify my dad's car like in most movies: spikes, reinforced windows and body, the works. pretty messy, but effective.
2) raid the gun shop near downtown, and get as much ammo and guns as possible
3) check in every single store in town to get useful stuff (clothing, food, playstation 2)
4) check for survivors
5) expand my house to the size of a whole block, by connecting all the houses (after devoiding them from any type of life and non-life), to have a nice, big headquarters, and block the streets in a 2 block radius, and set traps only a smart and informed human would know how to trespass (bear traps, grenades stapped to a wire, holes covered with a piece of cloth)
6) after having organized all the survivors, we build better traps, a better headquarters, better everything.
7) destruction of the dams. i live in the high grounds, so, after properly evacuating as many as we can, we flood half of the town.
8 ) we destroy all unoccupied buildings (leaving a few in case of expansion), and begin an extermination program, divided in grids, assigned to different groups.
9) after having cleared the whole town, we repeat steps 3-8 in the other two towns in this side of the island (the island is split by a chain of mountains, which i doubt the zombies could pass)
10) after taking control over our side of the island (and hopefully the other one too), we become a political-economical-military group, which will try to find people to join them, and find other groups to help eachother, basically creating a new world, with different countries and regions. during this period, we also reconnect all internet and telephone connections.
11) after peace is restored, and there are no more zombies, we start rebuilding, and restarting economy. after that, comes a period of (hopefully) peace
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5b) in case of being the last ones alive, i'd kill my dad, kill my mom, and kill myself. it's not like we'd last a month, anyways.
that's pretty much what i'd do.