We're expected to get 12" or so by the time the storm ends, which isn't a ton in the grand scheme (hello, 3 feet in Boston!) but I still made sure to load up on supplies.
My must-have item(s) are baking ingredients, since baking doubles as a fun activity as well as a tasty treat in the end. I actually grabbed a whoopie pie kit this time, just for something different (and easy). :)
What do you stock up on?