Teach Your Dog "OK" (or "Done")

"OK" let's your dog know "mission accomplished" after he's successfully completed a your command.  This isn't a praise (like "good boy", etc.) but instead let's him know he's done.  Start by asking your dog to sit and after he does, then stay (sit-stay).  When you've decided that he's satisfied the command long enough, say "OK" and snap your fingers, slap your thigh, or some other gesture to get him to move.  

Don't say "OK" if he moves BEFORE you decide he's done.  If he does, it's "No" and then start over.  Use "OK" after any of the "Sit", "Stay", "Down", etc. commands to let him know it's ok move on.