Our answer % and visits per day stats remains healthy both of which help make Stack Exchange very useful for the community.
At some point there was a GitHub conversation (I cannot find the link at the moment) where a developer suggested that certain open issues would make good material for Stack Exchange. I shared that idea on Reddit today.
Frequently questions asked on Reddit and IRC would appear to be more suitable for Stack Exchange.
Please share additional methods of increasing Stack Exchange activity. Currently we have many people that visit Stack Exchange to find answers, but rarely post questions.