Leave the strongest door unshuttered so you can get in and out of the house after the storm. Don't forget the garage door. Garage doors, especially those for two-car garages, can collapse in a storm. Protect the garage door with hurricane panels, as you would a sliding-glass door, or reinforce the door from the inside with wood studs or metal braces attached lengthwise. Also, make sure that the grooved runners in which the door's wheels travel are firmly attached to the wall.
Water is essential.
And it should not be skimped on. The average person needs to drink two quarts per day - that's eight cups. In order to meet basic needs for drinking, cooking and washing, the recommended allowance is two gallons per person per day. Authorities further advise to allow for pets' needs also. It is not safe to use containers that have held toxic substances.