How I Write an Adventure Part 1: Introduction Part 2: Objective Part 3: Motivation Part 4: Three Obstacles Part 5: Supplementary Information Part 6: Putting It All Together GMing Rules #1: If everyone is having fun, you’re doing it right. This is the only valid test for whether you’re doing it right. #2. You are not here to tell your story. You are here to enable the players to tell their stories. #3. Don’t invalidate the players’ efforts.