There is a feeling of being utterly alone, disconnected from all, that makes sleep very difficult. Alternatively there is instead a feeling of being connected somehow. I mean literally that my brain is somehow telepathically or morphogenically connected that gives reassurance. Perhaps it's just my nonconscious. Or perhaps it is an actual connection. (Twin studies of brain wave activity suggest it might be...) Whichever it may be, things start happening in my brain that are not being caused by my conscious. As they happen I relax and sleep can come.

And to lay here and think there is a connection helps it start happening. (Although far less important than proper physical activity and correct eating.)