Good behavior starts with a solid foundation. I have a small dog, so I understand the impulse to "baby" the dog but I HIGHLY discourage this. No more being "mama's boy"!

- Enforce NILIF: k9deb.com/nilif.htm
- Practice basic obedience daily and practice in distractive places as he understands the commands better.
- Don't know how much you exercise him, but a bit more exercise can't hurt (just don't overdo it)
- Pay particular attention to the commands "stay" and "focus". These two commands are invaluable to dogs who need to learn how to calm down. If you or your dog are having trouble with these commands, find a trainer to help you.

GSDs are powerful, intelligent dogs. They easily overtake their novice owners. I'd highly suggest bringing your GSD to obedience classes and continue to train and socialize the dog throughout his/her life.