My advice would have been, in order from best to worst: (1) don't go out (2) if you HAVE to go, make sure the car is ready for it, full tank of gas and fresh show tires, have warm stuff (sleeping bag, blankets, whatever you have access to...) in the car in case you get stuck of course hats / gloves boots basic food / water (3) if you didn't do any of that and you're relying on the car for heat, keep the entire exterior of the vehicle free from snow, ideally with a shovel you brought, less ideally, if your arms / hands. Just the tail pipe clear MAY be enough, but also may not be if exhaust is blowing under the car and getting inside. If you can, park it under a structure (bridge) or near a structure to help reduce snow pile up before getting truly stuck. Unlikely that'd happen though.