Not to give him a strangling jerk around the neck. Another compulsive method used to punish a dog when it misbehaves is to string it up by the neck so its front feet are almost off the ground. Another is to grasp the dog by the scruff of the neck, lift it up so that its back feet are just touching the ground, and shake it while you stare aggressively into its eyes and angrily chastise it. Yet another is to hold it to the ground and carry out the same procedure. These stupid methods invite face biting and ageressiveness.
Dog behaviourists reccommend food and treats to ignite a response.
If you use these rewards to get a dog to work you will never finish up with an accurate worker. My experience is that dogs trained by food rewards never become top trial dogs. Their minds are too influenced towards the rewards and they are not working to please you. Whatever method you employ, you must have a happy dog and go forward. If not, examine your method.