When leading project, PM should be selfaware, able to control his/her own emotions. But how to achieve this goal? Remember that your can 't change others, but you can change yourself.
Not controlling your own emotions offten ends up with action comming from feeling. In another words: Loosing control, you are loosing weight of your own words. And your risk to underestimate HUMAN factor.
Go outside of your comfort zone and ask yourself EQ questions: To know yourself better: How am I feeling? What are my emotions? What makes me other than other people? What makes me special? Be good in taking reasonable risks. Ask yourself: What is my intention? What have I tried so far? What is my strategy? Is it about the challenge? Do I have fun? What drives me? When having an difficult relationship What is the benefit of keeping this relationship? Before you go to sleep: What have I done today to know myself better? and finally: What do I do with information I have?