Update: The FAQ index has been updated and all posts linked there have been tagged with faq!
Writing a FAQ is in progress! Mod Tinkeringbell has been working on it behind the scenes :) Once it's ready, we'll start tagging the FAQ posts with the official tag. You can read (and edit, and vote on) the current set of proposed FAQ questions and answers here: faq-proposed
In the meantime, we have a few posts tagged policy. This is a regular tag, so any user can add it to a post. The tag description is:
Policies contain sitewide consensus about the rules on Interpersonal Skills. Use this on questions trying to establish a general consensus about policies on the site.
So, right now that tag is a good place to check for posts you can reference (the one you found here is tagged with that already).
I've also starred a few meta posts that I reference frequently, since you can easily look up your favorited posts by going to your meta user profile.