The DMG could probably use more examples of how to use its tools. Moldvay Basic has a nice example of designing, stocking, and running a dungeon on B55 through B60. The 5e DMG does have a a nice example of designing a new race in chapter 9, Dungeon Master’s Workshop. It’d be nice if there were other examples of applying and using the various tools after they were introduced. I’d have certainly appreciated an example to follow of designing a monster the first time I tried to follow the monster design procedure in the DMG.