Get the book "Before and After Getting Your Puppy" by Dr. Ian Dunbar. Get it now, and read it before you bring the puppy home. Dr. Dunbar is the foremost expert on training puppies and on puppy behaviour. I know Cesar Millan is the "sexy" choice for dog training these days because he has a successful TV show, but Dr. Dunbar is the true expert.
Consider their qualifications and the approaches and make an informed decision.
http://dogtime.com/cesar-millan-and-ian-dunbar.html
http://www.doggienews.com/2008/01/ce...ian-dunbar.htm
Lastly, I'll be picking up our chocolate lab 8 week old puppy the last week of May. Very excited.