Forbes Autos has seen fit to enlighten us with its idea as how to properly perform a test drive. Needless to say, they are not advocates of the "drive it like you stole it" approach (I've got a friend who treats every test drive like his personal chance to replicate the chase scene from "Bullitt"). There are some good tips in here, such as bringing along a second person to distract the saleman so that you can attempt to concentrate on the driving experience instead of chattering about interest rates or how well his kids are doing in school. To be honest, though, it's dang tough to get an accurate impression of a car in 30 minutes, especially with the complexity of today's features. I still say, try to rent a similar vehicle and live with it for at least a day.