alphadog,
I have a 115 lb Rottweiler and I have 2 small children.
Our dog has been cherished, loved, hugged, kissed, and well socialized with stranger people and animals.
She has been trained very well with manners - her sweetness she offers happily and willingly

...
My dog caught on very quickly and remembers her good manners even when I don't - LOL...
Using these simple commands: Come, Sit, Stay, Stop, Back, Wait, Easy, Slow, No, and OK, along with the hand gestures that go along with them worked wonders for me while training.
She has all her manners down pat with using those commands...
Your dog can too, but you'll need to teach the meaning of the words before you start telling your dog to do them, otherwise, they will have no meaning.
If your dog knows what the word means, you can apply the word to many different situations...
For instance, my dog is not allowed to go up and down the stairs when someones on them, she has to Wait... (I did this for my children so she wouldn't knock them down the stairs)
I don't have to tell her to Wait anymore, she just does...
She, on her own will, will not step foot on the stairs when someone else is on them...
I started out teaching her Wait by placing a treat in front on her nose and told her Wait while she was laying down.
Every time she went to eat the treat, I block the treat with my hand and said No / wait / wait. Then I'd say "Wait" again and remove my hand.
We repeated this process until she no longer went to eat the treat.
Then I'd say OK giving her the OK to eat the treat. (she already knew NO and OK)
From there, we worked our way up to bigger Wait tasks.
Back, is a good one I used for when we'd come home and she was excited to see us.
As soon as we came in the front door, I would tell her Back, Back...
Then I would tell her Stop so that she'd calm down,
then I'd tell her Easy and only say hello to her after she did what I asked her to do.
Now, she automatically backs up (she's excited to see us, but she's too far away to knock us over)
Then she immediately calms down because she know thats what she has to do in order to get a hello.
I no longer have to tell her or remind her to use her good manners.
I'm not the best to describe the techniques used in the training method, but this site has some good sticky notes on training.
Or, you could consult a dog trainer in your area.