Everyone else has covered the important stuff, so I’ll just recommend that, especially if you have kids, you identify the local sledding hill and get a sled, snow pants, warm coat, snow boots, gloves and hat. If you’ve gotta live in it, make sure you enjoy it when it comes!
Before it gets cold, turn off your outdoor spigots from the inside. If you have ducted air, change the filter every few months. If you have a furnace or boiler, be sure to have a carbon monoxide detector in addition to regular smoke detectors.