I think there are several ways to do this.1. When you see the dog do an accident, take him outside right then, and let him out OFTEN, When he uses outside, Give a reward.When not at home, Get some puppy pads. and confine him to a small, but spacious room, This don't help training for outside, just in certain areas when he just can't wait.But the key is Take him outside often, and reward when business is done out there,I had a pup, that went out everytime the other 3 did. She Never had a single accident (that i know of

. Hope this helps