Like many of you, I'm sure, I'm a huge fan of Seth Roberts and his pioneering work in self-experimentation (-something Brent Pottenger also writes wonderfully about. As it happens, both of them are involved in the Ancestral Health Symposium). I've come to think that, while scientific evidence has a vital place in finding out about our bodies, there is always a lot that will, for various reasons, fly under the radar of the scientific establishment. Self-experimentation is the key to finding out a lot of that stuff.
I think self-experimentation is especially fruitful when people share their results with others, thus this question: What have you found out through your own experiments? Also, I'd be very interested in any methodological thoughts y'all might have.
As for myself, the most useful thing I can remember finding out was long before I went paleo. I found that certain kinds of pu'er tea killed my craving for tobacco.
Anyway, I'd be grateful for your thoughts!