D&D session preparation

I just bought and started reading Never Unprepared: The Complete Game Master’s Guide to Session Prep by Phil Vecchione. In the introduction he states: "The end result is that many GMs hate to prepare their session notes. I have yet to encounter a GM who is excited to prepare their notes—at best, they have made some kind of uneasy truce when it comes to getting their prep work done." Apparently I am not a typical GM, because for me preparing a D&D session is already half of the fun. I pr

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