Something I learned in the Marine Corps that I've applied to acting is, one, taking direction, and then working with a group of people to accomplish a mission and knowing your role within that team.
The Marine Corps is some of the best acting training you could have. Having that responsibility for people's lives, suddenly time becomes a really valuable commodity and you want to make the most of it. And for acting, you just have to do the work, just keep doing it.
If I'm not doing something or working on something, I literally just sit in the room and think, which I don't think is productive. I won't go outside for days.
At the end of whatever we're doing, I always feel like I want to go back and start over again because now I have a better sense of what it is. I feel that with everything. Like, if you're doing like a long run of a play and you're doing it seven shows a week, at the end of it, I want to go back and start from the beginning.