This document outlines 23 keys for organizing a successful Massive Open Online Course (MOOC) and enjoying the process. It describes an online course taught by the authors' group at the University of Barcelona on this topic, which consisted of 8 modules over one month. The modules covered subjects like choosing a topic and platform, creating video content, designing assessments, and advertising the course. The overall aim presented is to find an engaging subject within one's expertise, identify an audience, and enjoy each part of building a MOOC.