Positive reinforcement training is the most productive and humane way
to start training for dogs. It is a simple theory that require
awarding the conduct that you need duplicated, and disregarding the
conduct that you don't. Once popular trainings such as intimidation
and using shock collars which by the way are inhumane, are totally
outdated. Positive reinforcement method works for house training for
dogs. A dog's natural instinct is to please you so when you use
positive reinforcement method, you're giving your dog more time and
probability to use the dog's own mind. This method ensures your dog to
learn lessons that are more meaningful and it will be more attached to
what is being taught.

http://www.squidoo.com/house-training-for-dogs has great tips for
house training your dog and how to enforce the simple yet positive
reinforcement
training method.