Welcoming a new puppy into the house requires flexibility and patience. The first few months your puppy spends with you sets the framework for a long and hopefully happy life. In these early days, you'll concentrate on his health and training, and be rewarded by watching him grow.
Schedule a visit with your veterinarian as soon as he comes home. Your vet can recommend a schedule for his vaccinations as well as regular treatment for internal and external parasites. Discuss a time frame for spaying or neutering your puppy.
Feed him at regular times, provide clean, fresh water at all times and take him outside frequently. If you cannot walk him, because you're not home or you're busy with something else, put him in a crate to minimize the chances of him having an accident. You and he will both be much happier if he quickly learns that the only place to go to the potty is outside.
Develop a schedule of playtime and time for just hanging out together. When he is settling in, try to keep the schedule as regular as possible. As he gets older, it isn't a big deal to stop for a bite to eat after work, before you head home, but in the early days a regular schedule helps you puppy feel comfortable.
Teach him to come when he is called. This is one of the most important things you can teach your dog. Not only will this prevent a lot of aggravation for you, but it can save his life. Start by sitting in the floor a few feet away from him and calling him by name. When he comes, give him a small treat and praise him. Repeat the process throughout the day until he eagerly comes when called.