I would have to say the most important thing I learned is to not rely so much on my tape recorder and to have better notes! I had a little scare after one of my interviews in which EVERYTHING from my recorder was gone. But somehow I found later (after a minor panic attack in my car)... Perhaps I just needed to get better acquainted with my tape recorder. However, the scare made me realize how important it is to take better notes! Lesson learned, check.
Thanks for reading!