] Once you've got your duct tape and plastic sheeting,
] Homeland Security suggests choosing a room in your home
] that is internal (not facing the street or yard) and
] large enough to accommodate your family in the case of
] attack. According to the HSD website, "ten square feet of
] floor space per person will provide sufficient air to
] prevent carbon dioxide build-up for up to five hours."
]
] You've got your room picked out - now what? Pre-measuring and cutting the plastic to fit each opening (i.e. windows and vents) can save a lot of time later. Having this plastic ready to go may mean the difference between having a nervous breakdown and having a nervous breakdown while affixing large sheets of vinyl to your windows.

OH MY GOD I DON'T HAVE AN INTERNAL ROOM, ALL MY ROOMS FACE THE YARD OR THE STREET!!!! OH, DEAR JESUS, I'M GOING TO DIE!!!!!! ALSO I DO NOT HAVE DUCT TAPE!

TIME.com: Living With Terrorism: A How-to Guide