Things that don't belong in questions
Answers! Keep questions in the questions section and answers in the answers section. And yes, you can answer your own question.
Why?
- People skimming the Q&A might miss it
- It's not possible to vote twice for a post, so you don't get any additional rep for it ;)
- If it's wrong, people might downvote your question undeservedly
- Ultimately, Stack Exchange works on the basis of questions and answers (or in another respect, problems and solutions, respectively)
For editors, you can go ahead and remove the answer yourself. Then, if it's worth keeping around (doesn't duplicate any existing answer, etc.), you may want to encourage the OP to post it, or post it yourself as a community wiki answer if OP is inactive or doesn't reply after a few days.