I would like to know the ground rules for writing the right harmonic notes over a melody. My objective is to learn the ground rules and teach myself how to do it with any melody. I'm just beginning to tinker on a keyboard just playing chords. I have a couple of real books so I have no shortage of material. Just as an example "But not for me" is interesting at first glance as an example as the book also has a Coltrane version(his choice of harmony fascinates me).