This report was developed to describe the procedures for updating existing O*NET tasks and writing new O*NET tasks (e.g., New and Emerging (N&E) tasks and green tasks). The procedural report provides a series of successive steps that are followed, including researching, reviewing, revising, and writing task statements for use in the O*NET system. Throughout these actions, Internet-based information sources serve a primary role in supporting and informing task revision and writing. Using online resources to collect task data is intended to be more expedient, more manageable, and less costly than other methods such as direct surveying. Task writing training procedures to ensure quality are also described.