Zappos prioritizes customer satisfaction to encourage positive word-of-mouth marketing, seeing themselves as a customer service company rather than solely a shoe retailer. Wendy's leveraged social media by engaging in timely pop culture references and memes on Twitter, and further sparked word-of-mouth when responding to a tweet promising free chicken nuggets for a high number of retweets, even though the goal wasn't reached. The document outlines strategies for businesses to encourage word-of-mouth marketing through customer satisfaction, social media engagement, and giving people something interesting to share.