Sport? I train every day. No-one sleeps better than I do. I have been training since I was a kitten. My body is designed for sleep. I feel the urge and without wasting any time I begin to think of my sleeping pattern. Have you ever seen a feline with insomnia? Of course not, we spend most of our lives practicing. I am now perfect.
Where you sleep is not so important but how you sleep. First of all take up the pole position, preferable where you see your surroundings. Higher places are recommended, or surrounded by three walls, with an opening to have everything under control. Before even thinking of closing your eyes you must go through the routine of circling clockwise three times around your axis. This is very soothing to the whiskers. When this part is completed, you may sink onto the surface. It is advisable to curl the tail around your paws, although not an absolute necessity. If there is room you may also stretch. I prefer change in my sleeping positions. It is less boring. And then close your eyes and drift away, although only one eye is completely shut from the outside world. We felines have a safety mechanism built into the other eye that registers any vibration of the air in the surroundings.
It is also advisable to sleep on a human bed. You can then completely relax and the human is also guarding your privacy in such moments. Yes, sleep is a wonderful game, it needs practice, but I win every time.