Don't ever program your GPS to take you to your home address -- especially if you leave your GPS in the car all the time. If you park somewhere and someone breaks into your vehicle, they can simply hit "go home" on your GPS and get turn-by-turn directions to your empty house. Instead of using your home address, use an address nearby -- a gas station, coffee shop, etc. Your GPS will take you somewhere familiar, but not directly to your doorstep.