Why most people are chronically dehydrated
The '8 glasses a day' recommendation is a rough average that doesn't account for body size, activity level, or climate. Someone who weighs 120 lbs living in Minnesota in January has very different hydration needs than someone who weighs 220 lbs doing manual labour in Arizona in August. This prompt calculates a personalized target based on your actual numbers, which makes the goal meaningful rather than arbitrary.
The tracking system without an app
Most hydration advice ends with 'download an app.' This prompt specifically asks for a non-app system, because adding another app is friction — and friction is why habits don't stick. The AI will typically suggest things like a rubber band on your water bottle that you move after each refill, or a simple tally on a sticky note, or anchoring water intake to existing daily habits like meals and meetings. These work because they have zero setup cost.