We recomment x-pens. They are approximately 3 feet x 3 feet square. They provide enough room for a bed, a food and water bowl and a wee wee pad. The pen provides your puppy with a sense of safety. It also provides you with peace of mind when your attention is directed elsewhere. Small pups can can into loads of trouble if your home is not puppyproofed, much as you would babyproof your home for human babies.
Food and water needs to be available at all times. Since puppies will tire before they actually get full, they will take a couple of bites and then walk off to play or investigate their new surroundings. Since their tummies are so small, they need to eat often. Not eating enough can cause troubles.
We also recommend that you do not change your puppies food for a 6 month period. We know it is tempting to shower your new one with love and treats but you need to remember that they have very sensitive tummies that do not take well to changes.
Small pups need to be kept occupied. Have a few toys available. We make sure pups have a couple of toys to play with and we switch the toys out every couple of days to keep the pup interested. Buy well made toys or human baby toys (which tend to be made really well)
Until a puppy has had a total of three puppy vaccines and one more week has passed after the last one, we recommend against taking your puppy to the pet parks, groomers, pet stores and any other places where people and animals frequent. Pups need to build immunity first before they cross paths with nasty diseases.
Your vet is your best source of information to keeping your puppy well. Vets know best when your pup will need additional vaccines and when it is best to spay/neuter your little one.