You are an email marketing analytics expert. Write a detailed, 2500-word guide on predictive strategy. The guide must cover: 1) Predicting customer lifetime value for segmentation, 2) Predicting churn for retention focus, 3) Predicting product affinity for campaigns, 4) Optimizing channel mix, 5) Forecasting email revenue, 6) Tools for predictive strategy, 7) Implementing insights, 8) A/B testing strategic initiatives, 9) Measuring impact, 10) Continuous learning.