Noun: Mental calmness, composure, and evenness of temper, esp. in a difficult situation.
My suggestion is for you to acquire words in your vocabulary which will not only improve your speaking and writing, but your life as well.
EQUANIMITY answers this challenge.
It is a strong character trait to keep your cool when all of those around you lose theirs.
In sports, this talent can take you from player to star.
Learn the word.
Visualize yourself cool, calm and collected.
Store the word in your mental treasury for safe keeping.
It will come in handy.