[Tekhne]

Turn your outside, rear view mirrors out on your car to completely expose your blind spot. When done right, you should have a continuous field of vision by scanning your eyes from your inside, middle rear view mirror to the outside mirror, and then by turning your head very slightly while still scanning your eyes to catch the cars directly to your sides. It's disorienting at first because you can't see the sides of your car, but that's rarely useful anyway, and when it is, you can just move your head until you can see what you need to (e.g. when parallel parking). You'll get used to the setup pretty fast. I can't count the number of times this hack has saved my butt on the highway.

[stretchwithme]

agreed. I think the right way to do this is move all the way to the driver's window and adjust that mirror so that it just barely sees the side of the car on one side. Then move to the center of the car and do the same for the passenger side mirror. You'd be the normal distance from the dashboard in both cases.

I think State Farm sent me that tip once. It makes it very easy to set mirrors up when you're in a strange car. And you verify by making sure that objects leaving one mirror enter the next one.