I personally never had issues sleeping, even on a crowded airplane, and there’s no secret about it, if I’m tired and my body needs a sleep, I just close my eyes

I personally never had issues sleeping, even on a crowded airplane, and there’s no secret about it, if I’m tired and my body needs a sleep, I just close my eyes and I’m gone, I don’t try to force myself to sleep, or trying to fit a typical schedule. Also taking magnesium helps with relaxation.