Inspired by this question: Idea: Weekly topic challenges
Judaism is full of occasions that happen on a regular cycle. For example, Jewish holidays happen every year, and we read the same Parsha every year.
It might be useful to bring notice to those question when we come around to them again. For example, this week is Parshat Pinchas. Last year at this time people asked questions concerning the Parsha. It might be useful to have them stick out, float to the top, or something like that (sort of like how the bounty questions are given prominence).
A year later, there may be some more answers to the questions, and people who weren't members last year may benefit from seeing the questions, or may be able to offer further insight.
This would also be useful when holidays come around, since there are lots of questions about the different holidays.
Some things, like Rosh Chodesh, Kiddush Levanah, etc. happen monthly, but it may be a bit much to see the same questions every month.