I periodically try to answer a few unanswerred questions for this reason. Apparently a queston counts as aswerred if it has at least one answer with at least one upvote, if I am not mistaken. It might be worth trawling through the unanswerred (but not zero answers) questions and identifying answers that are good (i.e. helpful, not necessarily perfect) but nobody upvoted. IA few of my answers, ahem, fall into that category.