If you need to drive during harsh winter conditions, make sure that you have tires that are designed for winter driving. A set of winter tires is the way to go. If you have installed them on your car and they are in good condition, you can enjoy piece of mind on the road.
Make sure that before you head out, you remove any ice from the windows and side mirrors and brush off any snow that might be covering the car, as this can otherwise start blowing around and impair your vision. Keep your distance to the cars around you, as the braking distance is longer during winter conditions, and adjust your speed accordingly. The tires need to gain traction when you accelerate, so push lightly on the gas pedal. With good quality tires that are in good condition you should be in good hands while you drive.