The 666 roadmap is a framework for thinking about product roadmaps in three timelines: the next 6 years, the next 6 months, and the next 6 weeks. This approach helps to break down the long-term vision into more manageable chunks, with the next six months being the focus of concrete planning and execution, and the next six years providing a broader view of the desired future state. The next six weeks represent the immediate plan, with design work well underway and team knowledge intimate. This framework can help align product roadmaps with the unpredictability of the world, avoiding timelines that are too long or too short for meaningful planning.