A Psychomotor Vigilance Task is what I've been using for my sleep dep experiments. It maps pretty well to my subjective experience of tiredness and reveals my worst moments in all their quantitative horror. (Once, at my worst, it took me about 15 seconds to respond to a stimulus.)
If you're trying polyphasic sleep, I would recommend everyman over uberman from my experiences.
During our latest meetup, the DC Less Wrong group has decided that we are interested in experimentally testing various lifehacks on ourselves (on an opt-in volunteer basis of course).
We need two things:
Do any other groups have any measurements that they take to track their various attributes? Anything that they'd be interested in testing?