Functional programming brings you not just fun, but also profit! Have you ever felt curious towards functional programming (FP)? Were you, soon afterwards, intimidated by the mystic terms like monads and functors? Do you think FP is not related to your Ruby work and thus, useless? Guess what–you can actually apply FP to your Ruby projects and reap benefits from it before fully understanding what a monad is! This talk will walk you through the powerful mental models and tools that FP gives us, and how we can readily use them to improve our apps in a language that we all love and understand.