A state trooper showed me this years ago.  Not only does it help me drive safer, it helps me check the blind spots without turning my head This is especially nice since turning my head is sometimes painful.  It takes some getting use to, but it is well worth it. This only works with vehicles that have a rearview mirror.  Click on the image below to watch an instructional video.  Please leave us comments on whether or not you would be  interested in seeing similar information in the future.