And, when they’re awake, petting. My little female corgi, Corky, loves this: She’ll flop on her back, look at you, and just wiggle until you bend over (or sit on the floor) and pet her. Then her little mind becomes an eggtimer: “Oooh pet me pet me I love the hand hand is good hand is good HAND MUST DIE! ATTACK!”
She doesn’t use the full force of her jaws because she’s just playing, of course, but suddenly having to play tug for one of your own appendages is a great way to increase your general awareness of the world and its inhabitants.
She most likes to sleep with her butt up against someone. Her head has teeth and her paws have claws, but her butt needs to be protected by a monkey. This can lead to a very small dog taking up 2/3rds of a reasonably large bed simply by forming a horizontal line from you to the other edge.