sang-froid, also sangfroid \sang-FRWAH\, noun:
Freedom from agitation or excitement of mind; coolness in trying circumstances; calmness.
It's french, if you couldn't tell.
A recent dictionary.com word of the day. Also the state of mind I am trying to maintain.
BTW, dictionary.com is a great on-line reference tool. Not only good for looking up words, but has a pretty good translation tool as well.