Not on this list is the famous Chapman protection system in the James Bond Movies... 

Probably on the list of highly traumatic events is returning to the parking garage or stepping out of your front door and discovering that your car has been stolen. Here are some tips that will hopefully keep that from happening to you.
1. Passive Immobilizers. Certain automakers equip vehicles with passive immobilizers as standard equipment, so consider opting for a vehicle that has such a system. The new 2015 Chevrolet Suburban/ Tahoe and GMC Yukon/Yukon XL are just some of these vehicles, and for the new model year they've been equipped with new anti-theft elements including window or glass breakage sensors, and vertical-movement and interior movement sensors. Tripping these sensors triggers the alarm and shuts down key control systems, making those SUVs almost impossible to start or move.
2. GPS Locator. Although expensive, GPS locators can be extremely effective since they use global positioning satellites to pinpoint the location of a vehicle. Once a vehicle is reported stolen, the GPS locator generally leads police straight to the stolen car. Subscription-based communication systems offered in certain cars, such as OnStar, also feature GPS-based stolen-vehicle assistance.
3. Lock Your Doors. Amazing, isn’t it? Reading some police reports about car thefts or break-ins, in most cases, the car has been unlocked and valuables are easy prey, in addition to the possibility of a stolen car! This sounds like a given, but according to the National Highway Traffic Safety Administration, 40 to 50 percent of vehicle thefts are due to driver error, with one of those errors being forgetting to lock the doors. While it's much easier to remember locking the doors on vehicles with a remote keyless system, it may be harder to remember doing that if doors need to be locked and unlocked manually. If this is the case, remind other passengers to lock their doors. In addition, try to keep windows rolled up, but if they absolutely need to be down, keep them open just a crack.
4. Keep Valuables Out of Sight. (See #3) Seeing valuables like phones, laptops, or tablets in plain sight gives thieves even more reason to target a vehicle. Try to take valuables with you, but if you absolutely can't, store them in the trunk or under the cargo cover (on hatchbacks). In addition, take extra precautions around the holidays, since thieves know people tend to leave shopping bags in their vehicles, especially in mall parking lots.
5. Know Where to Park. It's not uncommon for people to park their cars away from crowded parking areas in an effort to avoid car door dings, but parking in less-traveled areas makes it easier for thieves to get away unnoticed. With this in mind, park your vehicle in well-lit public areas. At home, your car is safer parked in the garage than on the driveway or street. And its safer for you to walk to your car close to a garage entrance than all the way across the space.
6. Take Your Keys With You. This seems obvious, but forgetting to take your keys with you can and does happen. Before you leave your vehicle, double-check that you have your keys with you, especially if your vehicle doesn't lock the doors if it senses the key fob is still inside the car.
7. Visual Warning Devices. The NHTSA reports there are certain programs that provide decals for vehicle owners to display on their cars to alert police that the vehicle is not normally driven between the hours of 1 a.m. and 5 a.m. Owners may also display another decal that signifies their vehicle is not normally driven across international borders. Steering wheel locks such as The Club and the Disklok may also help deter thieves.
8. Personal Alarm Pagers. Car alarms go off all the time, even when vehicles are not being broken into. Loud trucks can trigger alarms, and because we're used to hearing alarms in the distance, we don't think too much of it. Silent, personal alarm pagers can be more effective since they directly alert owners without waking up the neighborhood. Pagers can be purchased and installed by car alarm installers.
9. Window Etching. Law enforcement agencies sometimes hold free window etching events where they permanently etch VINs on windows, making it costly for thieves to mask the identity of the vehicle and easier for agencies to trace and recover them.
10. Brake Pedal Locks. A brake pedal lock is a more inexpensive way to keep your vehicle from getting stolen. The lock is placed underneath the brake or clutch pedal to prevent them from being pressed, meaning thieves couldn't drive anywhere even if they wanted to.
Having a car stolen because of inattention or bad decisions can affect your insurance coverage. Always remember that. Take a little extra time and stay safe! If you are in a situation where someone really wants to steal your car and you happen to be present, let them take it. The car can be replaced, you can’t.
(some of this information from