Michael Koby presented lessons learned from developing real world Rails applications. Some of the key lessons included: don't fear using scaffolding early on to quickly generate the basic structure; bundle your gems to manage dependencies; don't reinvent the wheel and leverage existing libraries; you can test functionality before building the full user interface; migrations are important for managing database schema changes; and seed data helps provide sample data for testing and demonstrations. Koby solicited questions and discussion at the end of the presentation.