It's becoming more common to have multiple professions in a lifetime.  People are rethinking what they want to get out of work and for many, work is no longer just for income but a way to make an impact in the world.

Every moment is an opportunity to feed the flywheel.  Always loved Jim Collins’ “flywheel effect” concept.  It’s Newton’s first law applied to business and such a simple idea that’s been used to grow companies the size of Amazon but yet is as applicable (if not even more so) to start-ups.