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.
Bring your puppy to the crate for naps and quiet-time breaks so that he can “unwind” from family chaos. Start in increments of 10 minutes and work up to longer periods. Offer treats when he goes inside, and distraction toys, like a stuffed KONG. For years, this author has been giving her Yorkie a treat every day as soon as he goes into his crate and sits. Now as an adult dog, he runs to his crate each morning in anticipation of the goodie.
Just as a child needs a caring parent; an athletic team needs a coach; your puppy needs a leader and a clear social hierarchy. If you do not take up the role of leader, your dog will; and you will end up with an unruly, disobedient dog. Many people try to win their new puppy's love by letting the puppy always have its way. Buckets of affection is a wonderful thing for most puppies, but it must be tempered with respect.