It would make the list of recent posts much faster for some of us to browse if everybody would remember to mark discussions they started as "Answered" with a recognized "Correct Answer" once the discussion has resolved the issue.
We could then see from the list that a little green check is on a topic (or not) and know 2 things:
Something still needs attention, or
Something we were interested in has been resolved, and it might be worth seeing how.
This will speed up browsing posts for both things to answer and answers worth reading. It will also mean that those who provide us with answers get the credit in their profiles for being helpful.