Situational Awareness
It can't be overstated, situational awareness will save you. When I was in the service, one of the warrant officers I worked with used to take the young guys out back of the building we worked in just to impress them with his ability to break a cinderblock with his bare hands. Then one day on his way home he saw a woman being assaulted by two less than upstanding citizens. He gallantly leapt to her aide and confronted one of the bad guys. His lack of situational awareness put him in the hospital when the second guy hit him from behind with a baseball bat. He was just slightly saved from a dirt nap by the guy's inability to swing the bat that little bit harder.
Above all else, remain aware of your situation.
It can't be overstated, situational awareness will save you. When I was in the service, one of the warrant officers I worked with used to take the young guys out back of the building we worked in just to impress them with his ability to break a cinderblock with his bare hands. Then one day on his way home he saw a woman being assaulted by two less than upstanding citizens. He gallantly leapt to her aide and confronted one of the bad guys. His lack of situational awareness put him in the hospital when the second guy hit him from behind with a baseball bat. He was just slightly saved from a dirt nap by the guy's inability to swing the bat that little bit harder.
Above all else, remain aware of your situation.