The following things have introduced '10x' returns for me (which is a slightly different thing than asked, but should relate):
0. Mathematical thinking: John von Neumann said, "If people do not believe that mathematics is simple, it is only because they do not realize how complicated life is." While this can be interpreted in multiple ways, I believe he was trying to say that life involves lot more complex mathematics than the mathematics we study at college and which some people already find complex. Economy, biology, ecology, are all big fat mathematical optimization problems, like in AI. And in fact, the notion of 'embeddings' in AI that is able to efficiently represent anything as a set of numbers has allowed seeing more mathematics in the day-to-day work. (PS: A recording of my talk related to this will be available soon.)
1. Ability to think holistically about the topic at hand: More or less, I am able to maintain the full picture in mind, ranging from the finest detail or smallest action to the big picture spanning not only a human lifespan but bio-evolutionary history and mathematical underpinnings of anything. Doing this well includes having to let go of beliefs held, questioning falsehoods, challenging the status quo. Facing traumatic situations has led me to rethink myself a few times in my life.
2. Selflessness, having and retaining clarity of the final goal: Problems happen, conflicts happen. Focussing selflessly on the goal helps letting go of smaller things and aligning people. Relentlessly work to help others; the rest comes by itself. (See also: Hanlon's Razor).
3. Authenticity and honesty: Being truthful, talking freely about ones weaknesses, experiences, readily admitting mistakes, goes a long way in engaging people and gaining their trust.
4. Curiosity and continuous learning, across diverse subjects: When I was a college student, I used to park myself before randomly selected bookshelves at the library, reading whatever books were in front of me. I barely used to be able to take any to the finish line which used to invoke a sense of guilt. In hindsight however, even reading first one or two chapters of books across a range of topics is very helpful. Needless to say Hacker News has helped a lot.
5. Having good verbal communication skills (which other commenters have already called out), and delivering presentations to large audiences: The first time I signed up, I was very scared, wanted to withdraw, but missed the deadline to do so. Do that -- sign up and miss the deadline to withdraw. The rest will happen by itself.
6. Writing: Other commenters here have already written about writing. Writing is a tool to think. It leverages the paper as a memory to bypass the limits of our working memory. It is useful for self-introspection as well.
7. Holding yourself to a high quality bar: Do not like yourself making mistakes. (#3 covers acknowledging them when you make.)
Note: Of course, the points above haven't given me 10^8x returns. :-) '10x' is to be taken figuratively only, and the returns from the above are not independent.