Make sure all passengers are wearing seat belts.
Use the defroster and windshield wipers for better visibility.
Brake, change speeds and turn slowly.
Give sufficient warning time to other drivers when turning, stopping or changing lanes.
Keep plenty of distance between cars. You never know when you will hit an icy spot.
Pump the brakes slowly and gently if your car doesn't have antilock brakes. Constant pressure can cause them to lock and skid.
If you do skid, turn the wheels into the direction of the skid.
Keep in mind that melting ice is still slippery. Drive slowly so that your tires can push water through their grooves for better traction.