Q. What can I do when I have nothing. Absolutely nothing on my mind?
A. As I see it you have two options.
1. It's a gift. Lay back and enjoy the nothingness of it all. I would say soak it in and try to remember how that feels. But then you are thinking about the nothing and that turns it into something.
2. Go to bed. You have a wonderful, restful sleep ahead of you.