The document discusses the Getting Things Done (GTD) methodology for improving productivity and reducing stress. It originated from David Allen's book and is based on creating a reliable external system for capturing all commitments and tasks. The key aspects of GTD include collecting all open loops, clarifying actions, organizing tasks into lists by context, regularly reviewing tasks, and choosing what to engage with based on priorities. Implementing GTD can bring benefits like an complete inventory, more control, and being more focused.