Wow there has been a lot of great information here. I have picked up a few new things myself. So thanks to everyone...
The great advice by all about setting the good positive foundation early, finding out what works best for your dog, because each is different. Be sure to catch him or her as they are doing what you want and start reinforcing that early. This way they will learn exactly what pleases you from the beginning and that will become there life's mission.

I think what I learned as a last resort was a bit different from the 'alpha roll'. I think I heard it called pinning. This is where they are put on their side, not completely submissive by exposing their underbelly, but they still get the point. You are supposed to hold them there until they quit squirming, and then they can be released. And I have seen this done by other alpha dogs. One of which was about a year old Golden who came over to play with my pup. She was relentless with her play and puppy teeth. He was getting tired, and just put pressure on her upper shoulder. He was gentle and kind, and she got the point. I think there lies an important key, gentle and kind.
I am not sure if I can quote someone, but here is goes hopefully I am quoting it correctly....
"We are in luck if, in training a dog, we can use his instincts as a basis for what we require. For the more instinctive an action is, the more reliable it will be."
Sabrina