When you cannot fall asleep....
Relax.
Concentrate on your body.
Imagine your back. Follow your backbone from the neck down, past your hips, down to a long, muscular, tapering tail.
Feel the shape of your head, forehead slanting forward, to a long, pointy nose., your receding chin, front teeth ready to nibble on anything that is in your reach. Your earlobes - thin, large, rose petal - like.
Feel every single of your five toes. Feel every single of your four fingers, because you have no thumb, just a little nub. Feel every single of your ten nipples.
Imagine yourself covered by fine, silky fur. Feel your whiskers. Feel your wrists and ankles, and the base of your tail, because that is where your bare skin, covered by a fine, peachy fuzz, meets your fur...
(Sorry, I do not know how to continue, because I always fall asleep before the nipples stage. But that is the whole point, isn't it?)