Robin’s Laws of Good Game Mastering - Rules of Play says:
Has your game got the blahs? Are your players spending more time thumbing through your book collection than hunting down clues, more energy heckling one another than in crushing their cruel foes? Never fear, o beleaguered Game Masters, for Robin D. Laws, noted game designer (Feng Shui, Hero Wars, Dying Earth, Rune) and columnist for Dragon magazine is here to help. Know your players! Analyze your system! Build your campaign! Design adventures! Prepare to be spontaneous, and improvise like a fiend! Whether you're a beginner or an experienced roller of the polyhedrals, the insights in this book will improve your Game Mastering faster than you can say, "Roll for initiative!"