When parking in attended lots or parking garages, leave only the ignition key with the attendant.
Park as close as possible to an open business.
Do not leave valuables in sight to tempt a thief.
Always park with the wheels turned toward the curb.
Back your car into the driveway. If you drive forward into the driveway, a car thief could raise the hood to hot wire the car, and it would appear to the neighbors that you were just working on the car.
If you have a garage, use it.
Lock your garage door.
Never leave your car running while it is unattended.