You should remember that starting from the end of February (post-GDC) a new season of gaming releases starts, which should see a bunch of new releases that naturally will cause a flow of new questions and therefore potentially new users.
Right after the holiday season most publishers lay low, because these games don't tend to sell very well (buying fatigue most likely).
The only thing our existing users can do is to ask any potential question they have while playing games on the site. But I don't think it's a good idea to force growth, by asking sub-par questions, because this doesn't set an attractive example for potential new users.
Just a comparison: in Math, Programming or using computer programs, questions stay relevant as long as people have need for them. I rarely pick up my old time games, because I prefer a new experience over replaying old ones.
That's why it's important that we're on top of new games, that's where our added value is right now. Writing a whole FAQ like Game-FAQs does takes a long time. If you can manage to help drive by users to find their answers here before the FAQ is up, we have a shot of getting them to ask questions new questions here.
The big difference between us and other sites, is that feedback here generally comes within minutes or hours after posting. Once new users get to appreciate this kind of rapid feedback, they'll probably ask their new questions here as well.
So my advice: be patient and keep playing new games and ask questions about everything that you can't figure out yourself!