I have tried 'no screens before bed' and it did nothing. What else is there?
The 'no screens' advice is correct but incomplete, and the GPT goes well beyond it. The real issue with screens is not just blue light — it is the cognitive arousal from incoming information, the emotional engagement with content, and the conditioned association between your bed and being awake. The GPT builds a layered wind-down that addresses all three: a digital sunset that ramps down information intake, a cognitive off-ramp (journaling or brain-dump writing), and stimulus control that reconditions your bed as a sleep-only zone. If you have only tackled the blue-light layer, you have addressed maybe 30% of the screen problem.