From experience I would also add,a) expect writing a song when the muse strikes, to take precedence over any other social arrangement...particularly if it involves your mother b)rehearsals go on until he thinks you've got it right, not until you do and c) his guitar will always come before you in a showdown...do not, repeat, do not, try and fight city hall on this one..it will always be embarrasing and sometimes downright ugly.