If you are puchasing a puppy from a breeder, the pup should have its first series of vaccinations before you take it home. Play with your puppy as often as possible, but don't teach aggressiveness by teasing. A must read for the proper socialization of companion dogs. Crate train your puppy.
Most dogs feel very comfortable with being confined to a crate for short periods of time.
This is an asset, for example, when your pup is a chewer and can't be left alone in the house while you run an errand. Don't paper train your pup. If you do, it may never learn to relieve itself outdoors. From day one in its new home, take it out shortly after each meal and a couple of times in between. Your vet will check it for all these parasites during your first visit.