fill up the gas tank and a gas can or two if you can
get as much water as you can
have cash! when the power goes out across a area there is no debit or ATM. be ready to purchase over a few weeks with cash things like ice, gas, food, and maybe even something as expensive as a chain saw or generator.
candles, batteries, radio, charcoal and/or gas for a grill, insect replellant... these are things that can help you deal with 2-3 weeks of being at home for an unknown amount of time without electricity.
hope it wont be that bad but if it does get rough being prepared will really help.