Today, I spend almost 20 minutes looking for the meta post "How do I write a good answer?". Spoiler alert, the post that I clearly remember upvoting doesn't exist because this post was about questions not answers.
Instead, I finally manage to find this discussion.
However, I would have found it more quickly if we were using the (red) faq tag, like what they have on meta Super User (and on other meta).
So, if you think that a faq tag would be a good idea, here are some discussion that, I think, could benefice for such a tag:
(If you have more, feel free to add it in an answer).