I like to transcribe the head when I have time, it helps me analyze how you can play around the melody and the kind of embellishments you can use. I also like to write everything down, although it is very hard work and takes a lot of time, because if I don't I tend to forget the transcription when I start working on the next one. My personal goal is to do one transcription per month and learn as much form it as I can in that period.