Don't leave anything in your car - if it's not there, then it can't be stolen.
Choose a stereo that can be removed and make sure you take it with you! You should also mark it with your registration number or postcode, in case it's stolen.
Thieves aren't picky, so don't leave even low-value items in your car. Often thieves will smash and grab first and look later to see if what they've stolen is valuable.
Don't hide it - if you hide items under the seat or in the glove box, chances are someone will have watched you. If you cannot avoid leaving something in your car, put it in your boot before you begin your journey.
Don't leave valuables in your car even for a minute - it only takes a thief a few seconds to smash a window and get what they want, so don't take the chance.
Your car isn't safe to be left unlocked on your driveway - nearly half of all incidents where items are stolen from cars happen when they are parked overnight, close to the owner's home.
Don't leave your house keys or anything with your address on it in your vehicle - someone could steal your keys and then let themselves into your home.
If it's portable, take the sat nav with you together with the support cradle and suction pads.
Wipe away any marks left by the suction pads as thieves will look out for these.
Don't leave your equipment in the glove compartment - thieves usually check here first.
Always secure your car.
Always lock your car and wind your windows up, even if you are just posting a letter or going into a petrol station.
If you are stationary in traffic, keep your doors locked and don't wind your windows too far down - someone could reach in and try to grab something off your passenger seat.