Help him relax when he comes home. When your puppy gets home, give him a warm hot water bottle and put a ticking clock near his sleeping area. This imitates the heat and heartbeat of his litter mates and will soothe him in his new environment. This may be even more important for a new dog from a busy, loud shelter who's had a rough time early on. Whatever you can do to help him get comfortable in his new home will be good for both of you.
Reinforcement can be anything your dog likes. Most people use small pieces of a “high value” food for training treats — something special — such as dried liver or even just their kibble. Lavish praise or the chance to play with a favorite toy can also be used as a reward. Dogs must be taught to like praise. If you give the dog a treat while saying “Good dog!” in a happy voice, he will learn that praise is a good thing and can be a reward. Some dogs also enjoy petting. Food is often the most convenient way to reinforce behavior.
Choose your dog's name wisely and be respectful of it. Of course you'll want to pick a name for your new puppy or dog that you love, but for the purposes of training it also helps to consider a short name ending with a strong consonant. This allows you to say his name so that he can always hear it clearly. A strong ending (i.e. Jasper, Jack, Ginger) perks up puppy ears—especially when you place a strong emphasize at the end.
Submissive urination is a normal way for your puppy to demonstrate submissive behavior. Even a dog that is otherwise housetrained may leave dribbles and puddles of urine at your feet when greeting you. Excitement urination with a puppy is usually caused by lack of bladder control. The puppy is not aware that he is urinating; he's just excited and any punishment will only confuse him.