One of the biggest challenges dog owners have with training a new dog is to train it to obey commands, including the word "no." The entire process is a matter of repetition and positive reinforcement for good behavior. But as part of the overall strategy, you need to know how to fix or stop bad behavior with the word "no." There is a method to doing this.
Instructions
Have a correction ready to accompany the word "no." This can be a pull on the leash, a firm but nonpainful slap on the nose, or a blocking move to stop the dog from acting out the behavior you wish to change. You can also use a water pistol to squirt water at your dog's face when you say "no."
Use a firm, controlled voice when saying "no." Keep the vocal tone level and nonalarming. This will enforce your control over the situation and establish you as the pack leader to the dog. Using a sharp voice or words before or after "no" will frighten and confuse the dog, making the word lose meaning.
Lead the dog away from the behavior with a slight pull on the leash or collar. Do this immediately after using the word "no" and the correction. Pull firmly but not quickly or with a jerking motion so as not to choke the dog or bruise its trachea. Have an alternative for the dog to focus on, such as a chew toy, another sight or sound, or food.
Praise the dog lavishly. Tell the dog how good it is for obeying your command. Show the dog how happy you are it obeyed you and how much you love it with plenty of rubbing, petting and hugs.
Practice these steps with the dog to reinforce the association among the word "no," the correction and the behavior you want to avoid. Always reinforce a good response with praise to associate the response with the act of pleasing you. Continue using the same correction and tone during the dog's lifetime so it doesn't get confused.