Whatever you do, PLEASE don't do the cliche "head shake" after you wake up.  You know what I'm talking about?  You've seen it in hundreds of movies, plays and TV shows:

A character, knocked unconscious, is revived and then violently shakes his head a couple times "to clear it."

This drives me NUTS!  Some so-called comedian did this once in some forgotten silent movie and ever since actors have been imitating it for years.  It's been used in every Three Stooges movie and every cowboy bar brawl and it's totally fake!  Warner Brothers cartoons even added its very own sound effect to highlight the absurdity of such an action.

If you have ever actually been knocked unconscious (and I have been once or twice thank you very much) believe me, the LAST thing you'll want to do is shake your head.  Nor will you wish to make any sudden, swift or violent motions at all.

In fact, unconsciousness usually is caused due to loss of blood flow or oxygen to the brain so when your character "wakes up" try any combination of these:

1) You will most likely have a raging headache. 

2) You will probably be dizzy and have difficulty focusing your eyes.

3) You will need help standing or sitting upright until you get your bearings.

4) You might even be nauseated. 

5) You will want to move slowly and take relaxing breaths.

Now you know how the phony "head shake" must've first come about.  Some director shouted "you're taking too long!  Shake it off and get back into the story!"  Plus, how many macho actors would want to be portrayed as nauseated and weak from a simple knockout?  Can you imagine Bruce Willis or Clint Eastwood saying "Gimme a moment, I need to rest."

Wow.  Sorry to vent.  But if I can prevent just ONE actor from incorporating the "shaking my head to clear it" routine then my time here on earth has been well spent.