We're actually working on this problem over at WakeMate. Basically the solution is to sleep just enough to accumulate the number of sleep cycles you need to fe

We're actually working on this problem over at WakeMate. Basically the solution is to sleep just enough to accumulate the number of sleep cycles you need to feel rested. We're building a tool to tell our users what that length of time is. I'll write up a post on the thought process/science behind it and put it up tomorrow.