Some things I do when driving in Ice or Snow:
I but a bag of sand or kitty litter, it adds weight but if I get stuck you can put some under the wheel. You get better traction if you get stuck on ice.
If stranded and you need to stay in your car, if running the heat make sure the exhaust pipe is not obstructed by snow or mud. If you don’t want to have the engine running the whole time, keep windows shut to keep heat in, and run the car every hour(depending on how cold it is outside) cracking open a front window when you do that.
If in a parking garage opt for an indoor spot when available, or away from the outside spots.