Accountability is the name of the game: at work, in the a marriage, in the practice room. As Simon Sinek says we are social animals, we don't want to violate the trust people have in us.
A short list of possibilities for musicians:
David Story: Professional pianist, drummer, composer, and educator. Well into his 5th enthusiastic musical decade, David works with adults pursuing musical dreams in the autumn of life, while he maintains an active presence in the Toronto arts scene.