For reasons that I've been unable to discern yet, about once a month I have a night where I find it very, very difficult to get to sleep. I generally take a long time to fall to sleep, tossing and turning, unable to stop my mind for racing long enough to rest, but, once in a while, it's especially difficult.
Last night was one of those difficult nights. I wasn't even able to get myself into bed until almost 2 AM, and by 4 AM I was still awake. I got up out of bed and went to the living room to lay on the couch and watch some TV. It was around 6 AM by the time I finally managed to fall asleep for a bit, only to be awake by 9 AM.
Surprisingly, I'm not that tired today. I'm wondering if, perhaps, this is my body's way of telling me I don't need as much sleep as I've been getting. I've functioned completely normally all day on less than 4 hours of sleep, so maybe my usual 8-10 hours is just too much. I think I was more alert and awake on less sleep, so I may have to start experimenting around with sleeping less.
I think I'll try getting up at sunrise every day starting next week. It'll give me more time to meditate and study in the mornings, as well as prepare me for the (hopefully) inevitable day I go back to work and have to start getting up early again any way.