By being calm, you can accomplish so many things. You can clear your mind, put first things first, accept responsibilities and get them done, follow the Seven Habits (look it up if you don't know what they are), etc.
I don't like the whole thing about lose-win or win-lose. I believe if you can work out a win-win situation in long term things, it's best. In competition, saying that someone loses and calling them a loser isn't exactly the best thing either. It isn't important that you don't fail, it's important that you get up and brush yourself off and learn after you fail.