The best thing you can do is to take a First Aid course (American Red Cross has 'em).
They'll teach you about the ABC's: Airway, Breathing, Circulation. Those should be the primary concern. With any accident, the concerns with airway also have to be weighed against the concerns of a potential neck injury.
Theres a lot to this subject, so you're really best off getting some sort of training.
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Why isn't 11 pronounced onety one?