The obedience class is a great idea.
Although i didn't take my dog to a class.I trained him myself. Another thought is to try a squirt bottle filled with water. When they get out of hand playing and such give them the command "no" (or whatever you decide to use) as you squirt them. I have used this and it works well.I had to use this for my dog kept biting at my feet when i took him outside and just the command no did not help.Neither did trying to distract him.Now he no longer does this but on occasion to test me. All i have to do is show him the bottle and he stops.

[ October 12, 2001: Message edited by: AngieS ]