Stand Alone
GPS Navigators vs. GPS Smartphone Apps

Most modern smartphones have built-in maps and GPS units. But those built-in apps don't give turn-by-turn audio directions, like those you may be used to from a dedicated GPS. You can buy apps that give turn by turn directions, but they tend to be expensive, and require up-front costs or monthly subscription fees. (Mapquest is a notable exception; it's free for iPhone, BlackBerry and Android.)

Also, most GPS devices are mounted to a car's windshield, which makes it safer for the driver. With a smartphone you have to glance down at the device, and take your eyes farther away from the road.

If your car doesn't have a GPS unit, buying an app with turn-by-turn audio directions plus a windshield mount for your smartphone might save you some money. But if you're already used to how your navigator works, there's no reason to "upgrade" and spoil a good thing.

Wired phone headsets vs. Bluetooth headsets

Most states now require a headset if you want to talk on your phone while driving. And wireless Bluetooth headsets are heavily marketed as must-have accessories for exactly that reason.

But what if you already have a wired headset just laying around? Keep it in your in the car and then plug it in when you start driving. It doesn't need to be "paired" with your phone or to have its battery charged, and then you will always know where it is when you want to use it. Other benefits: Wired headsets cost as little as $10, and often have better sound quality than Bluetooth models.

Thanks to Becky Worley-Yahoo News