Celebrating life keeps the spirits up. It is the best way to face danger. There are prayers and literary passages that help one retain control in the face of stress. The 23rd Psalms and the Lord's Prayer are good religious choices. I also like the Litany Against Fear from Dune and a variety of poetry.
Controled fear is a powerful ally.
It brings on adrenalin, crystalizes the thoughts and prepares you for fight or flight. Uncontroled fear becomes panic. Panic is your worst enemy.