People, pictures, and present tense.

People relate to people: the joys and sorrows, sympathy with the struggles of everyday life, common issues with family, relationships, and ministry.

People related to visual presentations: slide shows, video clips, Skype-type connections. When your people see what they're praying about, they're more likely to remember and sustain interest.

People relate to present-tense: the more current and immediate information you can communicate, the more urgent and important is your content.

Provide opportunities to respond or track the news stream: email, prayer requests, sign-ups, response mechanisms, focus groups, etc.

Kids for kids: if there are MKs involved, then setting up peer-group connections will keep it freshly before all those families.

Some indicator or barometer of progress-to-date based on the end goal is a very common need of supporting the work.