I mean if Im having a laydown I just rest or nap. I don’t really think of it as staring into the void. I love naps or taking it a easy for a bit. Moreso if I can do it outside with nice weather or even in a chair near an open window. Closing my eyes and listening to the birds and other bits of nature. Granted various noises can make that more of a no go if the timing is not right. Evening is even better with stars and the moon. If you start looking at deep breathing and mediation and having a few minutes is like gold. All that being said I like suduko and its a nice thing to do throughout a day a few mins at a time. I think tastes may vary with suduko though. Crosswords to but I have to be a bit desperate as I find they are more about me learning about the puzzlemaker than language really.