Important rules for First Aid are as follows:
Scene safety: Ensure that the site where the event happens is safe for the casualty and rescuer as well.
Assess: Find out what has happened, and then what is wrong with the person. Reassure the victim and continue with initial first aid management.
Call: Call for help to the emergency medical services / ambulance and inform the status of the patient along with all details of the site and existent facility.
Manage and reassess: Help the victim, preferably without moving him or her. Manage the manageable injuries or medical conditions under the purview of the rescuer. Reassess the patient frequently and manage accordingly.
