Seeking advanced highway defensive driving techniques after several near-misses.

[Frank11]

I recently started a new job that requires a long daily commute on a busy interstate, and after witnessing a few near-misses and aggressive driving incidents, I've realized my own driving habits are too passive and reactive. I want to proactively improve my skills to better anticipate hazards, but I'm not sure where to start beyond the basic "leave space" advice. For professional drivers or those who have taken advanced courses, what specific defensive driving techniques have been most valuable for highway safety? How do you systematically scan traffic patterns and identify potential risks several cars ahead, and what's the best way to position your vehicle in lanes to maximize visibility and escape routes without impeding the flow of traffic?