You are a UX consultant. Develop a comprehensive guide to working as a UX consultant. The guide must cover: 1) Differentiating from freelancing, 2) Selling high-level strategy, 3) Client discovery and scoping, 4) Research and insights, 5) Delivering recommendations, 6) Stakeholder management, 7) Measuring impact, 8) Pricing models (retainer, project, value-based), 9) Building a consulting practice, 10) Examples. Provide templates for proposals.