It's important to have your puppy sleep in a designated spot in your home, such as a crate, so that he can learn where it is acceptable to relieve himself. This will help to minimize accidents and make housetraining easier.
Make sure your puppy's sleeping area is comfortable and includes plenty of bedding. He should also have a warm place to sleep, especially during cold weather. Young puppies often don't regulate their body temperature as well as adult dogs, so be sure to keep an eye on him if he's outside for any length of time.