In this series, I show you homebrewer Dungeon Masters of any skill level how to use actual, good game design to build a pretty good dungeon adventure for Dungeons & Dragons or your system of choice.
Let’s Build a Pretty Good Dungeon: Introduction
Let’s Build a Pretty Good Dungeon: Critical Paths
Let’s Build a Pretty Good Dungeon: Exploring Spaces
Let’s Build a Pretty Good Dungeon: How Players Explore

Thanks for pulling all these together and posting them. I was just designing a series of encounters for PCs to escape some catacombs as the dead were awakening. The PCs needed to choose one of four directions through the catacombs and reading this series helped me define the golden path and helped me make sure there was no way character choices could lead to a crappy series encounters. Good stuff, me and kids had a blast. This series helped that happen.