In Derek Sivers’ How to Get Rich, he advocates for learning multiplying skills:
Speaking, writing, psychology, design, conversation, 2nd language, persuasion, programming, meditation/focus.
Not pursued on their own, they’re skills that multiply the success of your main pursuit.
(A pilot who’s also a great writer and public speaker.)
(A chef with a mastery of psychology, persuasion, and design.)These skills multiply the results of your efforts, and give you an edge over others in your field.
This explains one of my reasons for learning to write. In the short time I’ve been writing, it has benefited me tremendously in all aspects of my life.
Learning any of these multiplying skills early on seem to have compounding effects. Expertise is not required either in order to benefit. Perhaps learning a few of these skills as 100 hour assets would suffice.