The GSMEAC format is a well-established format for providing briefings around a task.
Ground: Where is the task happening?
Situation: What has made the task necessary?
Mission: What needs to be done? (I say again, what needs to be done?)
Execution: How are we going to do this?
Admin & Logistics: What do we have to do this with?
Command & Signals: Who is to do what?