Monica Cellio noted in this chat comment that participation on Mi Yodeya seems to be going down. She specifically mentioned traffic, questions/answers per unit time, and voting. This graph of votes/post over time seems to support this statement. I'm guessing that part of the problem is that regulars are not visiting/voting as much as they used to.
Monica suggests a competition in her message there. Does anybody have any ideas for contests or other ways to improve participation? I was thinking that some kind of reward for earning participation and/or moderation badges might be useful.
What does everybody think? Do people have their own ideas to improve participation, especially of our regular users who are no longer as active in recent months as they used to be?