Suppose you have a mission which reveals something important about the campaign's plotline. You know what the critical message will be about, but you don't have any full sentences yet. You plan to put it into the initial phase of the mission before hostiles jump in. You initially plan a two-minute-long dialog between Command, the pilots, and possibly the convoy ships you're protecting. You want to create an effective build-up phase before the message you want to convey is uttered explicitly.
What steps would your writing process entail? Will you take some paper and pen with you the next time you invite your friends over for a coffee and note down some witty remarks, expressions that sounds good, etc? Or do you just write something preliminary in Notepad and revise it a couple of times until you are satisfied with it? How do you decide whether what you wrote is okay or should be completely rewritten? Do you simply refuse to look at it for a couple of days, just to make sure you can view it with a fresh head the next time around?
What's your preference?