Don't Have Your Car Visible Anywhere in Your Mirrors
This is one of those things that takes next to zero effort to do right, but that almost everyone does wrong.
You hopefully already know that the "blind spot" is the name for the area on either side of a car that is invisible to wing mirrors. It's such a frequent cause of accidents that higher-end car models have adopted fancy radar or camera systems capable of detecting other vehicles in your blind spots and delivering the information to you in furiously urgent beep-screams as you swerve in terror and/or crash anyway.
However, the technology isn't the problem -- the necessary equipment to eliminate blind spots was around back when Henry Ford was still producing cars and anti-Semitic newsletters. All you need are your car's wing mirrors -- which most people have adjusted incorrectly.
You see, blind spots can be put into full view of your side mirrors, provided that these mirrors are adjusted to contain no part of your own car. Just angle them away from you until the point where your car is no longer visible in either one, and leave them there. That way, there's no overlap between them and the rearview mirror, and any car that's passing you on either side will remain in at least one of your mirrors until it enters your field of vision.
Admittedly, this seems less like a "tip" and more like "the most obvious piece of instruction of all time," but nobody freaking does it. Manufacturers have to let you adjust the mirrors (due to things like differences in driver height), and most people simply don't know how to do it. That's why those same engineers are spending millions on technology meant to eliminate blind spots -- they have simply failed to teach people not to point their goddamned mirrors at the sides of the vehicle they're attached to.
Pay More Attention to Traffic Than Road Signs
If you saw someone blow past a yield sign into traffic and vanish in an explosion of steel and glass not unlike one of the Iron Giant's volcanic diarrheas, you'd be tempted to blame the crash on the driver who ignored the road sign.
But what if the yield sign wasn't there, like those intersections where there's nothing but an esoteric flashing yellow light and everyone stops and stares at each other? There would probably still be the odd person who flies through, but average drivers would become extremely cautious as a result of having no clear instruction of what to do. They would instead just intuit their next move based on the traffic around them, which is kind of the point of stoplights and road signs to begin with -- to force you to stop and look.
In other words, you may be better off without the signs.
There are experts who believe that the overabundance of signs and signals just make you complacent, because you're fixated on blindly following instructions printed on reflective metal rather than not killing your fellow drivers. And we've all seen it happen -- drivers with a green light will plow through an intersection and T-bone another car that was clearly in their path, simply because the pretty colored light told them they had the right of way. And think about how people will lose their freaking minds if traffic and/or weather conditions have them driving slower than the posted speed limit, routinely causing accidents by trying to weave their way back up to maximum warp, even though the speed limit is literally just a number on a sign that takes absolutely nothing into consideration beyond what a few civil engineers came up with on a calculator 30 years ago.
