This document discusses how pre-sales and post-sales support can be used to increase sales during the Christmas season. It provides 10 tips for using pre-sales and post-sales support, including reassuring customers, offering incentives, allowing customers to test products, providing demonstrations, offering warranties, following up with customers, apologizing for issues, acting urgently to fix problems, showing appreciation, and surveying customers. Pre-sales and post-sales support can be delivered through various communication channels like call centers, social media, and mobile apps.