Move with Purpose (or The Removal of Unnecessary Motion)
One of my personal favorite shorthand directions when working on a staged play I stole from my second ex-wife.
"Move with purpose."
So simple.
Translated it means that if you are going to cross from point A to point B, have a reason to do so that connects with the character's life in the play. It funnels down to mean that all movement, down to scratching your face or tying your shoe needs to connect with your purpose. As an actor, it's an extremely helpful tool as I have a tendency to move around a lot with no function other than I just have lots of freakin' energy.
...that when you spend time helping the truly broken—the ones who require more patience than seems reasonable—you walk away with two revelations: how much of yourself still works, and how vital the fragile thread of kindness is that holds people together.