Great article! I also thing there are individual variations between people... even when I was a kid, my mom had the hardest time getting me to go to sleep for naps, and when she did I would end up getting her out of bed at oh-dark-thirty the next morning.
As an adult, I have seldom slept more than about 6 hours... even if drunk and on vacation. My body just says "ENOUGH! Get up!" But there may be something to be said for more sleep because I don't always feel fully rested... of course, having a sleep apnea doesn't help matters.
Most of the time sleeping problem is a result of too much thinking, that even when you are already on the bed, you keep on thinking of something that you wanted to do. Many people find it hard to stop thinking. I will make a post about it in the future.
I do a meditation before bed sometimes, and I find that it doesn't necessarily make the sleep longer, but definitely better quality.
What kind of meditation you do? If you dont mine.
I'm kinda jealous. I have to sleep at least 8 hours to be able to function properly, but I need galleons of coffee anyways!