Vampires need to eat blood to survive, but they also require rest to maintain their energy levels. This raises the question: Where do vampires like to sleep?
Many vampires believe that they must sleep in vessels that contain soil from their homeland or from their grave. Dracula, for example, requires boxes of Transylvanian dirt to be present at each of his sanctuaries in order to sleep properly. Others simply need to be in a dark, secure place where they cannot be discovered by hunters or intruders. This usually means they sleep in a coffin, though they may use other sarcophagi if the container is sufficiently large and secure.
Some vampires do not sleep at all, choosing instead to remain in a partial state of dormancy during the daytime. They must keep their bodies warm enough to avoid melting, but they do not lose their ability to regain energy by eating or drinking. These vampires can often be found hiding out in places where humans do not go, such as secluded buildings or caves.
Other vampires do not need to eat or drink blood to stay alive, but they must still rest in order to keep their energy levels up. They do this by entering a meditative state similar to sleep. They are always peripherally aware of their surroundings, but they can only be roused by loud noises or bright lights. This form of rest is not as effective for regaining energy as sleeping, but it does enable vampires to avoid becoming sluggish during the daytime and to hunt more effectively.