Situational awareness is something I go over and over during self defense classes. Unless you have a well trained unit or platoon of people, there are many ways to extend your periphereal and be more aware of your surroundings. For instance if you are in a vehicle, cameras can give you both a record and additional ability to see what is around you. The Falcon Zero is my favorite for recording stops and accidents. And the Apex backup camera allows a much better view of your surroundings. If you are in the house and want to extend your visual abilities, this set up is amazing and works very well with Android or Apple products. Zomodo four channel camera with dvr setup. You can add cameras and set it up with a separate power supply, which will allow uninterrupted ability to expand your sphere of awareness.
The following is a great article (second in a series) outlining additional ways to stay alert.
Situational Awareness: Part 2 – Micro & Macro SA | A.H. Trimble – Emergency preparedness information for grid-down