The document discusses how to avoid "waterfalling" work during a sprint in Scrum. It recommends splitting stories into smaller tasks, identifying independent tasks early, and "swarming" to complete higher priority tasks first before moving to the next. This allows delivering items earlier and prevents bottlenecks at the end of sprints where everything needs to be tested and completed at once. Key principles are smaller batches, less work in progress, and more parallel work through collaboration within cross-functional teams.