A Little Competition Can be a Good Thing
Let your Chapter members see which of their peers are the most active on your Chapter microsite. Right now, this shows the leader board for all CSI members across all CSI-related sites, but it can be limited to just your Chapter members. Various activities earn points, and members can be rewarded with badges and ribbons on their profile based on the points they accumulate. You might be surprised at how motivating this can be for your Chapter members.