Generate a full, in-depth guide on the Business Model Canvas. The guide must be a practical workshop in text form. It must include a detailed section for each of the 9 blocks: 1. Customer Segments. 2. Value Propositions. 3. Channels. 4. Customer Relationships. 5. Revenue Streams. 6. Key Activities. 7. Key Resources. 8. Key Partnerships. 9. Cost Structure. For each block, explain what it is and provide guiding questions to help the user fill it out. Please include a disclaimer that this is a strategic planning tool.