"Call my wife at work."
In most states, getting caught driving with a cell phone pressed to your ear will earn you a moving violation ticket -- and it isn't likely to be cheap. That's why it's common now for cars to offer hands-free Bluetooth integration, so you can talk on the phone while still keeping both hands on the wheel. But you still need to dial the number you're calling or at least pick a name from your phone's address book, right? Not necessarily. More and more cars are offering voice commands for cell phones, so instead of punching in a number you can simply say, "Call Bill Williams." And if you have more than one number in the system for Bill, your car can then ask you (shades of KITT, the talking Trans Am!) "Do you wish to call Bill Williams at work or at home?" Now, if you've anticipated this problem, you can get around it by saying "Call Bill Williams at home," so your car's literal-minded electronic brain won't get confused. Naturally, you have to preprogram your phone (or the car's address book) in advance with Bill's various numbers. But you've probably done that already, right?