Ask HN: How does one optimize oneself for employment at a startup?

I've been listening to the "How to Start a Startup" podcast, mostly out of idle curiosity, and I've just finished the second episode, "Team and Execution".

In it, Sam Altman talks about who the right people are and who the wrong people are to be one of a startup's first hires, and as he describes the right people, I realize that I don't currently fall into the category of the right people. My coworkers wouldn't call me the "best in the world at what I do", although what I do is mostly disagree with them on how to get things done.

I am aware of plenty of material out there that explains how to be a good/not terrible startup founder, but what can I do/learn/change to become a better startup employee? I want to work in this space, but I have a very strong new fear of being the "bad employee" who tanks someone else's incredible idea.