Checking our Area 51 page, question activity has nearly dropped to a standstill, just over 1 question a day. How can we encourage users to continue to ask more high quality questions and encourage positive activity?
It is true that question rate is an important criterion for graduation but there are 13 sites with a lower question rate than us. That includes some that have been in beta for four and a half years. I'm not dispirited.
For one thing, spread the word that we are here. We need a bit more visibility. I've seen questions get closed elsewhere as off-topic but would have been good here. If you see any, add a comment to them. Just that bit of advertising is something.
There has been some work in the background about starting a blog (Kudos to @wizzwizz4 for effort). That may help.
Historically, I've seen site activity generally pickup during Winterbash. Thanks to the cross-site publicity that produces, I would expect some fresh users to come this way then. Although of course that would be a few months off yet.
I've said before that we are building it, they will come. That still holds true.