Churches often give out newsletters. And yet often newsletters are produced for one purpose and one purpose alone: To share information.
This information could take the form of updates, news, upcoming events, mini-sermons, etc.
I don't think there's anything wrong with wanting to share information, except I feel that in addition to, "What do we want our members to know?", churches should be asking themselves, "How do we want our members to act?"
In other words, a church newsletter should an instrument of getting members to:
Participate in church activities (e.g. mission trips, visitations, carolling, etc.)
Give generously should there be a need
Talk and think in a certain (hopefully godly) manner
The next step then becomes: Given these (and similar) aims, how would a church newsletter be different (if at all)? Some obvious consequences would be:
Information would be selected based on pre-defined behaviour objectives of the church
Articles (and their 'tones') would be written not from the usual "write-anything" or "thematic/seasonal" approach, but from the anticipated impact on the members (e.g. building curiousity on a certain topic)
Biblical passages and homilies would be chosen as lead-ins' to the future events or programs
Activities (games, quizzes, etc.) would be tailored towards eliciting more participation
Etc.
Focus on desired action/behaviour and you'll get your information dissemination goals thrown in as well. Focus on information alone (as we, alas, normally do), and you probably won't get the behaviour part.
Talk about a (clearly specified) 'purpose-driven' newsletter.