The first step of Emergency Action Principle is to Survey the Scene.  As a trained rescuer, it is imperative to assess the scene by observing for the following:

The Safety

Take a look around to ensure the surrounding area is safe for the rescuer as well as the victim.  Note: unless there is an imminent danger, the victim should not be moved.  Assess the surroundings for any people who can help.

The Type of Injury

This observation is extremely important in an effort to understand the reason for sustained injury: automobile accident, electric shock, fall, fire, etc.

The Location

Make sure you are aware of your location (for ex. floor in the building, etc), to help emergency responders locate you.