For those that are evacuating, Sandy taught me many things. Take pictures of both the interior and exterior of your homes, including tv's etc... Also, be sure to have both your Homeowners and Flood insurance declaration pages in the event you need to make a claim (I pray you don't).
As bizarre as many of you may think this is, if you use a safe deposit box at a bank in a flood zone and the box is close to the floor, GET YOUR STUFF OUT OF IT. The branch of the bank I use took 4+ feet of water through it during a sandy and about a month after the storm, we were finally able to access our safe deposit boxes. So many people lost all their box contents. There was still bay water sitting in them. And I think of all the times I groaned because mine was up so high
If you're on a barrier, grab plenty of clothes, meds, important docs...etc... in the event access to the barrier is restricted (couldn't get back to my house for over two weeks after Sandy).
I know every storm is different but I hope this helps.