It is important to establish your authority with your dog. Never be cruel with your animal when showing this authority. Build a good relationship with your dog as soon as you can to help with the training process.
There are a few different techniques you can use to teach your dog to walk on a leash. The technique most often used is to give a quick snap on the leash whenever your dog decides to pull on your leash. Then stop walking with the dog until he stops pulling. Then you give him positive feedback every time there is slack on the dog leash.