Great Ideas are Worth Nothing “Great Ideas are Worth Nothing” – it’s classic piece of advice, and the Keep Calm and Carry On poster is a classic piece of design, so why not marry them up, just for fun? Related posts: Spy Novel Plots – Four Great Spy Story Ideas The Great Impersonation: Book Review High Concept: How to Discover a Blockbuster Posters for Writers – Phase Two Alternative Spy Thriller Movie Posters Posters for Writers