You may already know what you want to accomplish by hosting a writing or editing contest. This section will help you identify and clarify your goals, as well as explain the different kinds of contests. You will also find tools that may help you identify topics exciting to your community:
• Set contest goals: Ask the community what they want to do, and what they think is important.
Identifying contest goals may sound more challenging than it actually is. If you are starting a new contest, create a space where interested participants can discuss ideas about what they want to improve on the Wiki or in the community. Common goals include: filling content gaps, engaging new editors, motivating long-term editors, improving content quality, or getting more volunteers involved in project planning.
The idea was to find a way to get more people who know about physics involved in WP. The main goal was not just how many pages were created, but to grow the number of people in the physics community on Wikipedia, so that administrators have experts they can ask to review content. We did that by asking experts to spend 30 minutes judging and leaving feedback on article discussion pages. - PhysiWiki