One of the cornerstones of good health for your puppy is regular veterinary care. It is crucial that your puppy maintains a nutritional diet and exercise routine to stay healthy and balanced. Plus, your vet can advise on heartworm, and flea and tick preventative care. While a lot goes into keeping your puppy in good health, it all begins with the first visit to the vet.
Teach him to come when called. Come Jasper! Good boy! Teaching him to come is the command to be mastered first and foremost. And since he'll be coming to you, your alpha status will be reinforced. Get on his level and tell him to come using his name. When he does, make a big deal using positive reinforcement. Then try it when he's busy with something interesting. You'll really see the benefits of perfecting this command early as he gets older.
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.
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.
Imagine your puppy running out the front door. You call him, waving a treat. But he'd rather chase a squirrel into the road than come back to munch on a treat. In addition to the obvious danger of Puppy getting hit by a car, he learns that he doesn't have to listen to you. He learns that he's in charge of what he decides to do and what he decides not to do.