Positive training lays the foundation for a lifetime of mutual respect, compassion and good canine citizenship in the world. It also teaches your dog to think for themselves, not just because you told them to - and helps them settle into their new home with good positive structure, routines and management. By teaching your dog to focus on you and "check in,"  your dog will look to you for guidance and direction. Below are some great articles on positive training on the value of laying down this foundation with your dog:

Why Building a Positive Reinforcement Training Foundation Is So Important:
http://www.whole-dog-journal.com/issues/13_12/features/Values-of-Positive-Dog-Training_20145-1.html

Why Training with Treats (aka Positive Reinforcement Training) works the best, and is not bribery!
 https://positively.com/victorias-blog/why-positive-training-is-not-bribery/

Vary your reinforcers when called for!    
https://positively.com/contributors/crack-not-crackers-choosing-the-right-reinforcer/

Turn off Cesar Milan and learn why "Pack Theory" is de-bunked:
http://www.whole-dog-journal.com/issues/14_12/features/Alpha-Dogs_20416-1.html