Moral 1: make a plan and stick to it, so people know what they are trying to achieve when things go wrong.
Moral 2: things go wrong, it doesn't mean that you forget the plan.
Moral 3: when somebody says "don't worry, I'll handle that" you need to ask "how?", even if just so that when the big explosion occurs, you get an extra half second to act.
Moral 4: sometimes the plan isn't working. Then you need a new plan. You probably need to disengage first.
Moral 5: "amateurs study tactics, professionals study logistics" - rubbish, you can send anyone shopping; concentrate on training, morale and making sure everyone knows their part in the plan.