I like to think i'm prepared if something like that happens, i have weapons, from knifes to crossbows to blunt weapons and sticks with nails in (very effective), but i haven't really thought about other stuff, like power, water filtration, but i live by the sea so i would probably try and get a boat. but the other problem with that is that i wouldn't want to steal a boat until there was actual anarchy by which time the actual owners would probably have taken them, but other than that i would probably kill to protect my (actual) friends and family.