Compared to other Stack Exchange website, we do not have many questions under the FAQ tag (only 3 posts, compared to 17 FAQ posts on TeX.SX or Mathematics.SX). These questions really help users (newly registered or older ones) to get more familiar with site policies and disciplines.
What are the characteristics of a good FAQ post? What issues do we need to be covered on this website as FAQ? What topics are not covered in the current FAQ posts? Do we need a wiki-type answer to this question as a to-do list of topics which need to be answered in form of FAQ? Or kind of tag on meta for posts which propose a FAQ issue?
Also, I think that it does worth if users find some good questions in meta; (if these questions have minimum characteristics of a FAQ post) propose them to be tagged with such FAQ tag to make them easier to be found by other users.
As an instance, Mathematics.SX has a tag on its meta under which users can propose FAQ topics called faq-proposed.