Make sure that when the cute little puppy grows into a dog you treat him as well as you did when he was a cute little puppy! Most love able pet you can have. Spouses can grow complacent in a relationship. But a dog is always happy and excited to see you each and every day!
Play with it an hour or more everyday, give it healthy dog food, train it and give it treats for doing things right, keep its water dish full and clean, take it on walks around the block every other day or every other day, go to a dog park so it can socialize, and make sure that it's healthy by going to the vet whenever you feel it is needed. Also calm it when it is scared and if it is really tiny, protect it from birds of prey. A bird tried to take our Pomeranian when she was just a puppy, but my mom grabbed her before the thing caught her.