Don't forget pet food!
If you have a well, or you are in an area that uses pumped water instead of a gravity-based system, fill the tub full with water in addition typo the drinking water that you have saved, because you may need that for flushing your toilet.
Once the storm starts, nplug ALL non-critical electronics and appliances. It's not lightning that present the bigges risk, it's power fluctuations and "brown outs" which are common in big storms.
If you are a multi cell phine house, if the power goes out, keep only one on at a time and really conserve the battery in that one. If you have a land-line and don't already have a regular corded phone that doesn't have to be plugged in, get one.
Fill a cooler with ice and put your "can't live without these things" essentials In it, then if the power goes out, do not open your fridge/freezer for any reason! also helps to completely pack your freezer with ice - just fill up a bunch of plastic containers, water/soda bottles, or anything else that will hold water
If you have kids there, think through in advance about games and activities. Buy several things for them that you can pull out one at a time while the weather is out to help alleviate boredom and stress.
Buy nutella and wine.
