This document discusses upselling and cross-selling strategies for customer relationship management. It defines upselling as convincing a customer to purchase a more expensive or higher quality product than originally considered. Cross-selling involves encouraging existing customers to purchase additional complementary items. The document provides rules and best practices for upselling and cross-selling, such as remaining relevant to the original purchase and leveraging different price points. It also discusses using predictive models, bundling strategies, and pricing approaches to optimize upselling and cross-selling opportunities.