We have over 13,000 questions with no answers, this feels somewhat like a concern to me.
Some other ideas than just answering include:
Give bounties to the highest voted questions, helping them get answered.
Spit through the negative and zero vote questions at the end, either ...
... get rid of crap by closing questions that don't fit Super User.
... upvote and edit questions to fit Super User more, the latter bumps it so people see the Q.
So, with this meta discussion I would like to call to action to find proper ways to lower this number and to actually get this number down together. It's as easy as clicking Unanswered on the front page, then no answers and working through that list from front to end, or from end to front, or going to a random page number and starting from there.
For those bored or burning out from reviewing, and other enthusiasts...
Let's get some more questions answered!