Choose a quiet area without distractions, and have plenty of treats ready. Place of the treats in your palm and let your dog smell the treats. Hold it four or five inches away from his face. Your dog may smell the treat and paw at your hand. Reward your dog with a treat each time he paws at your hand. Repeat until your dog consistently touches your hand. Move your hand to the other direction. Your dog will have lean to follow the treat, which will encourage him to touch your hand.