Some gleaning from posts past and present;
Always sit with your back to the wall, even if you have to ask someone to move.
Sit on the aisle seat, see above.
Know where your exits are.
Keep your eyes moving and your brain in gear.
A question here, What about parking the car? Do you park in the getaway position? From my observations, 99+% of people don't.
I was never LEO, did my stint in the service, was never an 'operator', but carried a gun for a living for six years. The dome light in my car is disabled, and I always pull through to park. so I can drive directly away. . When it says head in parking only, I find somewhere else to go. I also park where I cannot be blocked in, although this is sometimes difficult.