I tried one way for sleeping well the day before yesterday. I often hear it is good that do light stretching before sleeping. So I checked book written about yoga or stretching. And I found ''night yoga.'' This exercise is easy, because it can do with sitting. Also it takes about only 5 minutes. I felt confortable by stretching my body.
I can't mention obvious effect, but I could feel confortable and moderate weariness before sleeping. So I could go to sleep soon.
I think I want to do this stretching from now on. I think it is important to continue!