The FAQ has contained one key bit of advice from the very beginning:
It’s also perfectly fine to ask and answer your own question, as long as you pretend you’re on Jeopardy! — phrase it in the form of a question.
If …
To be crystal clear, it is not merely OK to ask and answer your own question, it is explicitly encouraged.
I do it all the time! For example, when I ran into a nasty issue with Java exploits in Google Chrome when browsing for images, I documented that on Super User by asking and answering my own question. Now, others can benefit from my misfortune — and best of all, I got new even better answers beyond what I offered! Overall, a huge win all around. …