Tom O'Brien discusses his experience using various social media platforms for educational purposes. He has used Twitter, Diigo, LinkedIn, Pinterest, and Wix, with varying degrees of success and challenges. Twitter and Diigo have proven most useful for connecting with other professionals, sharing resources, and adding annotations. However, all platforms present challenges around managing time spent on them and organizing the content shared and collected. O'Brien also reflects on his experience as a student and teacher using the Moodle online learning platform.