Excuse my plug of schlock mercenary, but "The seven habits of highly effective pirates" fits so well.
Pillage, then burn
A Sergeant in motion outranks a Lieutenant who doesn't know what's going on.
An ordnance technician at a dead run outranks everybody.
Close air support covereth a multitude of sins
If violence wasn?t your last resort, you failed to resort to enough of it
Mockery and derision have their place. Usually, it's on the far side of the airlock.
Never turn your back on an enemy.
Sometimes the only way out is through.
Everything is air-droppable at least once.
A soft answer turneth away wrath. Once wrath is looking the other way, shoot it in the head
Do unto others
Your name is in the mouth of others: be sure it has teeth
Give a man a fish, feed him for a day. Take his fish away and tell him he's lucky just to be alive, and he'll figure out how to catch another one for you to take tomorrow.
Don't be afraid to be the first to resort to violence
The enemy of my enemy is my enemy's enemy. No more. No less
A little trust goes a long way. The less you use, the further you'll go
Only cheaters prosper
If you?re leaving scorch-marks, you need a bigger gun.
That which does not kill you has made a tactical erro
When the going gets tough, the tough call for close air support
There is no 'overkill.' There is only 'open fire' and 'I need to reload.'
Just because it's easy for you doesn't mean it can't be hard on your clients
Oh, and some of my own:
Destiny is just a term used when people don't want to take responsibility for their actions.
Justice is one of those modern myths, like the tooth fairy or Santa Claus. Vengeance, however, isn't.
Oh, and:
There is ALWAYS someone with a bigger stick.