Printable resource sheet with NPC names, hirelings, steadings, quests, managing the spotlight, and more.
Lots and lots of ambient soundtracks to play to bring audio to your scenes. There are audio tracks for caves, campfires, cities, inns, forests, and more.
Six steps for doing boss fights.
As we all know, the hardest part of GMing is herding all your players together to actually play.
A friend showed me this tool and I really liked the maps it built. There's both a free and a paid version.
I play as though it does, but maybe not to the extent discussed in this post.