New top story on Hacker News: What people skills do you wish you learned earlier in your career?

What people skills do you wish you learned earlier in your career?
8 by mparkola | 2 comments on Hacker News.
For the past several years I've been putting in a lot of time into learning and sharing people skills (without the bullshit). I'm interested in skills from dealing with your own emotions, through communication with close co-workers to high-stakes negotiating. I'm curious: what are some people skills that you wish you had learned earlier in your career or that you wish your co-workers had easier access to? Also: what are your favorite books and/or other resources that helped you?