What skill have you developed since leaving formal education that has been most useful in your career?

I would highly recommend the book “The Four Agreements” by Don Miguel Ruiz. One of my favorite sections of the book is when he discusses the principal of not taking anything personally. We’ve all heard that before, but the way he explains it was an “ah ha” moment for me. Everyone sees the world through their own eyes and experiences, so we should aim to not take anything they do or say to us personally, even the positive compliments.