Awesome post, i could not agree more! ...and i'm quite sure i was guilty of all the fails possible in a musical and personal way.
Maybe a thing i would add, is: be cautious about the people you surround yourself, the nosy ones will make you nosy too, and the humble ones mostly are the best to learn from. At least to my experience. As a musician you should serve the song, not your ego ;)
Have a wonderful day, and thanks for this wonderful article.