Make sure of looking after the boat with all this snow. Bring a broom and or a good bucket to wash it off with salt water. Charge batteries, make sure the bilge pumps are clean and working. Freezing can also be a problem, and moisture. Ask for help if you are not sure what to do.
Spring will be here soon, but you do not want any problems in the mean time. If you see any other boat in the marina with trouble, let them know.