Before I ask that question, I will ask this one: Is there an appropriate forum to ask questions about the forums? Stack Exchange has a META subforum for their forums, to ask questions about the forum itself, like "is this an appropriate question?" or "which is the best forum to ask about xxx?"

I would rather ask in a central forum just for these type of questions.

OK, now my question. If I solved a problem myself and want to share it, what is the best way to mark it as the solution? Do I need to post the question, then answer it and mark the reply as the correct answer? Can I just mark the original post as the answer (asking because I already checked and I cannot)?

What is the best practice here?