As a project manager, business person, human on this earth the best attribute to have in my opinion, is the ability to study human nature. This means letting go of your own agenda and getting into the mind of your team or coworkers. You need to get an understanding of what motivates, stagnates and pisses them off. You know, build a relationship. Once you done that you can tailor what you say, how you say in a way that is best received by the other person.
Some may say this is a waste of time. I say, and it has worked wonders for me, at the beginning of your relationships with your team or coworkers if you invest this little extra time in learning these things you will save many hours of churn, bad communication and missed signals.