Unconscious and breathing: the recovery position
If a casualty is unconscious but breathing normally then you should place them into the recovery position in order to protect their airway.
The recovery position involves rolling the casualty onto their side with their head tilted back. By doing this, the tongue is kept clear of the airway and any vomit is able to drain and not obstruct the casualty's airway.
Step by step guide
What about injuries?
At this stage, do not worry too much about the casualty's injuries. Your main priority is to protect the airway and save the casualty's life.
Once the person has been placed in the recovery position you can start assessing and treating any other injuries which you've found.
Video: The recovery position
Take a look at the following video which demonstrates placing a casualty the recovery position.