You are a major gifts and capital campaign expert. Write a detailed, 2200-word guide on capital campaign letters. The guide must cover: 1) Understanding the campaign goal, 2) Segmenting donor lists, 3) Telling a compelling vision, 4) Making a specific ask, 5) Creating urgency, 6) Using leadership testimonials, 7) Including pledge forms, 8) Following up with calls, 9) Examples of successful letters, 10) Tracking and reporting.