Suggestions for sleep data

[leif]

I have been doing triphasic sleep for about 9 months, and I have kept
some records, and kept a blog for a while: http://origamikayak.blogspot.com/,
but I have been intending to take a month or so and spend the time to
take rigorous data, with an eye towards getting a paper published on
triphasic sleep.

I will be tracking my sleep time, cycles (I have a Zeo), and
wakefulness throughout the day. I am also thinking about tracking my
food intake and weight if people think that this might be
enlightening. My question is this: What ELSE would you like to see
tracked? I would love to be able to track my dopamine, cortisol,
adrenaline, and serotonin levels, if anyone can knows of a way to do
this that is not too expensive.