From Dogster.com….
Some puppies are easy to potty train. Others can pose a bit of a challenge. No matter what your dog’s personality, the key to successful potty training is knowledge and consistency.
Canines of all species are naturally inclined to avoid going to the bathroom in their “den.” In the case of domestic dogs, they can learn to see your entire house as that den. It’s not hard to help a puppy make that connection if you are diligent and persistent. The trick is to create a habit where the only place your puppy eliminates is outdoors.