What life lesson do you wish you'd learned earlier?

HA! where do I start -
OK if I had to pick one it would be - challenge all assumptions.  I never viewed myself as a follower and during my childhood challenging assumptions would be considered rebellion.  But I have only now really and truly begun to ask the big questions of "why the hell am I doing what I am doing?"
I feel like I am making up for lost time, since parts of my life (like my career) has been on autopilot and do not reflect my true self.

Joy