Sometimes it's just not an option not to go to work. Some jobs depend on having someone there at all times, no matter what the weather is like. If you have a job like this, it's important to keep an emergency stash of food, water and blankets around just like you would in your home or car.
If you have advanced warning of the storm and you need to be at work, drive in before the snow starts and plan on staying until it's safe -- even if that means staying the night. It's a good idea to bring a sleeping bag and some extra clothes if this is the case. You should also make sure your family has everything they need before you leave.