So many people set there side mirrors where they can see their door panels. I never understood this, theres no reason you need to see your own car in the mirror. My side mirrors are set farther out and basically into the "blind spot" area. I can see any car on the left or right side in my rear view mirror, side mirror or combination of the two.
The split mirror on the driver side works well too I find, makes for faster checking if someone is there. I also never do the "over the shoulder" check, the most I go is looking at my side mirrors and whatever I see peripherally beyond that.
When I took driver's education, we were taught there is always a blind spot. You can fill that in less than a second with a quick glance. Done correctly, your neck or chin should not move hardly a fraction of an inch. If you can't learn how to do that, maybe you want to get one of these:
I have a bigger problem with the A pillar blind spot.I have one road I drive on daily that has a long sweeping left curve.In the A pillar you can loose a 40 mule team and a school bus.