I'm an evangelist about this, I know, but protect sleep as much as you can. The literature on its importance is absolutely stunning. I know there seems to evidence that gifted kids may need less, but I'm not personally all that convinced of that--I think they just work harder to stay awake, in many cases.

Also, many people don't know this, but teens need at least 9 and hopefully 10 hours a night or so per the literature. Sleep needs increase at that age, and sleep cycle shifts.