In most cases, a flat, emotionless tone is a career killer; when Arnold Schwarzenegger uses it to deliver “I’ll be back” in “The Terminator,” it’s a genius character choice. Top-level actors ...

“If it were done when ’tis done, then ’twere well if it were done quickly.” This is probably not how you’d tell someone to hurry it up in your day-to-day life. But as an actor, you’re likely to ...