Trophyhunter nailed it - I would add some battery powered lights (and extra batteries) for use while fueling or changing oil in generator. I always use stabilized gas for my generator-nothing worse than generator that won't start in middle of storm.
Get more extension cords than you think you need.
You need to have the generator protected from rain/ice/snow but outside-away from doors and windows-exhaust can kill you.
Be sure you do not backfeed current from generator into power company system-you don't want to hurt those that are trying to resore your service.
You may want to plug a light into the house wiring so you know when power is restored.

Don't wait to buy a generator or a chainsaw after it hits-they get hard to find and prices get ridiculous.

Good luck - I hope it misses you all!