Generate a full detail guide on how to take a truly effective mental health day. The guide's tone should be permission-giving and restorative. It must include sections on: 1. How to Know When You Need One. 2. Activities That Genuinely Recharge You (vs. those that drain). 3. The Importance of Unplugging from Work and Stressors. 4. A Sample Itinerary for a Restorative Day. Please include a disclaimer that this is a preventative tool, not a long-term solution.