I've been a long time reader of the website and found plenty of useful advice for what the role of the GM in game is (and what it isn't) to keep my sessions rocking and rollicking along during my occasional forays behind the screen. I am now in the throes of planning my first truly lengthy campaign next year and I keep a copy of this right next to my other planning materials. Loads of useful advice on structuring a session, designing encounters beyond just mindless action, and dealing with the inevitable problems that will crop up. I've recommended this book to all the other GM's I know and two other members of my regular group and myself were all Kickstarter backers. Highly recommended for both the novice and veteran GM.