When you come up with puzzles for the game Zendo, the goal isn't to beat the players. The goal is to make a challenge for them that is lagom difficult.

But when you are running that puzzle in Zendo, you can't then be in the mindset of changing the rule in order to accomodate the players. You need to stick with the game as it is.

I try to bring that philosophy to D&D. I use completely different brains when I write dungeons (now we're running a pre-made dungeon though, Tomb of Annihilation right now) and when I am running them. That's rule number one for me. The "prepping" hat and the "running" hat.

I've tried to kept the House Rules document short. I also make rules for myself as DM to follow.

For the conversational initiative I use cards to keep track of who has acted. For resolving social situations without skill rolls I use rules from an expansion to Hillfolk. And for searching for traps and treasure without rolls. These rules are "invisible" but they are there, under the hood.

Etc etc

Different dungeons also have different rules, like how often monsters appear etc etc.