Generate a full, in-depth guide for writers on how to overcome writer's block. The guide must be written in an encouraging and empathetic tone. It must include detailed sections on: 1. Understanding the different psychological roots of writer's block (e.g., fear, perfectionism). 2. A list of 10 practical, short exercises to get words flowing again (e.g., freewriting, writing prompts). 3. The importance of a 'creative well' and how to refill it. 4. Mindset shifts for detaching your self-worth from your productivity. Please include a supportive disclaimer.