Once upon at time I was a really good sleeper - I have always been a night-owl, but 8-10 hours of quality sleep? Not a problem. Then I had open brain surgery, and it all stopped. I was no longer able to turn off my brain, with racing thoughts every night and usually no more than three-to-four hours sleep per night for about a year after my operation - I was a total zombie.

Things have improved a lot since then - still a night person, I do still have trouble falling asleep but nowhere near as much. Now, my problems come from burning legs and feet, and not sleeping due to stress from knowing that I am behind in my work because I can't seem to process or concentrate as well as I used to, which in turn reduces my productivity.

Given the opportunity, I could sleep for ten hours a night these days. I just always seem to have work (marking or lesson planning or whatever) to do until late at night - which I am sure, explains why I can' sleep.