So, don't get lulled into a false sense of security. Do everything slowly and gently. Remember, in the snow, the tires just barely grab the road. Accelerate slowly and gently, turn slowly and gently and brake slowly and gently. To do this, you have to anticipate turns and stops, slowing down enough to make turns before you get to them, leaving plenty of distance between you and other cars.
Rapid movements lead to skids and loss of control.
If you feel your car starting to slide, pump the pedal to slow the car if you have standard brakes. If you have antilock brakes, don't pump, but apply slow steady pressure. If your car starts to skid, slowly let up on the accelerator and steer into the skid. If you are nervous about driving in winter, consider spending some time practicing. Go to an empty parking lot and try sending the car into a little skid on purpose.