Mental preparation for physical confrontation
What works well with me is, I tell myself every time I exit my car that “someone is going to try to kill me.” I find facing the fear that we all have is much better than denying it. Denial is our enemy. Once you’ve accepted that someone will do harm to you it is not a surprise when it happens, and it makes it much easier to combat those actions.
I once was dispatched to a man with a knife at a bus station. My dispatch advised that the man was drunk and he was threatening people with the knife. We arrived to find the man standing by himself.