Sweat and Blood
“Sweat in training so you do not bleed in war”, whoever said that hit the nail on the head.
The best way to deal with chaos is to train for it, to train yourself and your team to not panic, to think critically, and to always know what the goals are.
That last one is particularly important and too often neglected, what are we actually trying to accomplish? Where are we trying to get to?
Spend some time finding out if your team is on the same page.
Get skin in the game, sweat