Left on their own, they form packs. The pack is organized. There are leaders and followers, all equally essential to the pack's survival. The people lead, the dog follows. It's that simple.
Many people tend to forget their dog is a dog.
It is important to recognize and respect your dog for who and what he is. You must be able to communicate with him and read his body language. He needs structure and guidance if he is to function appropriately within the family. If your dog does not know the commands SIT, DOWN, and STAY - teach them. Use lots of praise and positive reinforcement.