After a question I've asked has run its course and an answer has been accepted, is it worthwhile summarising the key points raised by the answers into a foot-note of the original question?
I realise that not all questions are suited for this, but on some of the more information-centric questions it would provide a useful, quick reference for future viewers.
Edit: An example.
On this question I asked, all of the answers were excellent but none of them explicitly stated the solution I was looking for, so after I worked it out, I updated the answer to include the working solution.