The actor has to only ask one question—what does the character want to do? (Bill Ball, A Sense of Direction)
• The to-do part is essential. It leads to action, and action is at the core of the acting process.
• That’s why it’s called acting, not talking.
• The to-do provides the character with a purpose.
This resource offers a list of potential 'to-do's to apply to scene work.