I have been driving for 40 years now with only 1 accident where some dumb a** started to make a left in front of me, saw she wouldn't be able to make it and stopped right in the middle of the intersection ! 2 cars totaled was the result and she was cited.
I have always subscribed to 2 philosophies:
1) drive like a fighter pilot. But defensively, not offensively of course. Keep your eyes moving at all times in a 360 degree direction scanning for threats and always position yourself in lanes where you have some room for maneuvering.
Pay attention to what you are doing when in charge of a 3000 lb missile doing 70 MPH. You don't need a nav. screen, phone, large Starbucks and other crap to distract you.
This also assumes that you are driving a vehicle that is "fighter plane" like with outstanding handling and brakes and not a 3 ton SUV that handles like a pig on stilts and will turn turtle if you have to make any sudden moves.
2) The Bell Curve theory. This means that 1/2 of the people that you come across at any given moment are dumber than average. That is pretty bad odds. Anticipate the worst and the unexpected. You will survive longer.