When you are young you learn from your parents, teachers, mentors and other people more senior than you. But from whom do you learn when you are no longer young and there are not many people around who would be more senior than you? In my experience, the best strategy to keep on learning even when you become senior yourself is to have children, mentor students and help your junior coworkers. By teaching and helping the next generation, you are not only forced to better understand and articulate your knowledge and experience, but your knowledge and experience is constantly challenged, which often results in you having to discard the past experience and learn new things.
For over 13 years I have been working at startup companies, and yet had no idea what it really meant to work at a "startup" until about 4 years ago. I think the reason for that can best be explained by leaning on Steve Blank's definition of a startup, which is "an organization formed to search for a repeatable and scalable business model.
- ADDENDUM: Learn How To Build Your Startup By JOINING One (juangreatleap.com)