Much of the FAQ will be somewhat boilerplate: “be nice,” “how to create an account,” “how to ask questions” — it’s all pretty static. Even the sections about “what kind of questions should I (not) ask here?” comes primarily from the Definition phase of Area 51.
But the questions you want to discuss in meta are those issues specific to your site that need to be mentioned in the FAQ.
Take the Super User FAQ as an example:
Super User is for computer enthusiasts and power users.
If you have a question about …
- computer hardware
- computer software
and it is not about …
- videogames or consoles
- websites or web services like Facebook, Twitter, and WordPress
- electronic devices, media players, cell phones or smart phones, except insofar as they interface with your computer
- a shopping or buying recommendation
It took us almost a year to figure out the list of “we want these sort of questions” and “we don’t want these sort of questions” on Super User. Area 51 gave you a head start but you should also be working out other FAQ-related issues specific to your topic and your community.