Suggestive selling and up-selling are techniques used to increase sales and average customer purchases. Suggestive selling involves recommending additional products to suit customers' needs, while up-selling focuses on persuading customers to upgrade to higher-cost items. Examples include fast food restaurants asking customers if they want fries with their burger or gaming centers offering longer play times at a discount. To be effective, salespeople must know their products thoroughly and pay attention to customers' reactions, addressing the host first and suggesting appropriate additional purchases discreetly. The goal is developing long-term relationships and repeat customers rather than just maximizing one-time sales.