This is a great video by Mike Glover. Very informative. You will learn a lot.
Always a good reminder to not just look, but observe.
I dont think you can watch the whole series unless your a subscriber, but craig douglas’ ecqc and reality of criminal assault series on WPSN i found very good too.
This seems like a good read >
What fits in your surroundings? What things look normal? not just using your sight.
What is off around your surroundings? What things are out of place? Position yourself with purpose.
Practice your awareness to improve your awareness. Practice people watching.
Can you spot someone carrying concealed?
What is in people’s hands? What are they paying attention to?
Evaluate your surroundings not just people but multiple exits that you can use or evasion routes whether you are on your feet or in your vehicle.
Keep your head on a swivel but do not make yourself look paranoid just alert.