What is the number one rule for potty training? Take your dog out often! When your puppy is running around and playing, it is a good idea to take him out as often as every 15-20 minutes. It may seem like a lot, but it works to prevent your puppy from feeling the need to go in the house. Reward your dog when he goes potty outside by praising him and playing with him. When you reward your dog for going potty outside, it clicks in their mind that outside is where they need to be to do their duties and not inside.