This document provides an introduction to edit-a-thons, which are scheduled gatherings where volunteers collectively write and improve Wikipedia articles. It explains the purposes of edit-a-thons such as content production, promotion, and volunteer recruitment. The document then outlines steps for organizing an edit-a-thon, including setting goals, choosing a theme, determining the target group and program, and acquiring necessary facilities, content, and support. It emphasizes that cooperation requires managing expectations as not all potential partners will be a match.