"How about tomorrow?"
A GM's nightmare. A group that has a planning horizon of twelve hours (sometimes even "how about right now?"). A group in want of a Fate game.
And a group that isn't into the whole Fate game creation process.
This isn't the first time this has happened to me, and I'm often caught off guard by the short time I have to prepare. It's usually not "tomorrow" specifically, but campaigns often start within the span of three days. Often, this throws me off guard. The groups I'm usually with also typically aren't a fan of pregenerated games, but have liked some of the games I've made when given time in the past.
Currently, the way I see it, if the group is together for six hours, 1.5-2hrs of that is dedicated to character creation, and about 1 hour for eating. That leaves roughly three hours of actual campaign time to fill in.
I'm usually given some guidelines from players on what they'd like, but they're also usually pretty lax.
Consequently, my question is pretty simple. What's the minimum amount of information I need to prepare in order to run a successful first session of Fate Core? After the first session, I can have more leisurely preparations for future sessions. However, the first session needs to be done on short notice.