Whenever my pit was a puppy I had a designated spot as his “time out” spot. Don’t make it his kennel though because when you put him in there as you leave he will just think he is always in trouble. I just got a cheap bath mat from wal mart and used that. Walk him to the mat and make him sit and if he moves take him straight back to it. I always made mine (Brixx) sit there for ten minutes without moving then would let him off of it. It takes them a while to understand to stay but with patience they will. Now anytime he is in trouble he knows to go to that spot.