The best way to get a dog to stop barking is to first identify the cause of the barking. If the dog is barking due to boredom, try providing more exercise and mental stimulation. If the dog is barking due to fear or anxiety, try to desensitize the dog to the trigger and provide more positive reinforcement. If the dog is barking due to attention-seeking behavior, try ignoring the barking and rewarding the dog when they are quiet.