Generate a full detail guide to journaling for mental clarity. The guide should be practical and creative. It must include sections on: 1. The Benefits of Externalizing Your Thoughts. 2. Different Journaling Techniques (e.g., Stream of Consciousness, Bullet Journaling for Mood, Gratitude Lists). 3. A Collection of 20 Prompts for Different Needs (e.g., for anxiety, for self-discovery). 4. Tips for Overcoming the 'Blank Page' Fear. Please include a disclaimer.