Had to think on this one,as in how/what I do . First of all dogs are wolves and wolves are dogs, therefore I use their language,place your hand over the muzzle so that it wraps around the nose and bottom of the jaw, now squeeze with light to moderate pressure and look right into their eyes while in a rough or gutteral tone saying no or whatever noise you choose.Now, DO NOT look away from the dogs eyes for whatever reason(this is called stareing the dog down and is a DIRECT challenge to the dog),as soon as the dog turns his eyes from you (this may be a slight movement or quite obvious) release your hand and walk away as if nothing happened, after oh say 15 , 20 sec. call the dog to you and and make friends again. In time all you will have to do is stare the dog down when he does something that rubs you the wrong way.