This is a topic that has caused me a great deal of pain in the early days of my transition to Obsidian and during the setup of my [[My Zettelkasten system]]. Originally, I tried a handful of systems such as giving each note a "Parent" link as well as subject-matter tags. I also contemplated and researched the potential use of front matter so I could utilize data view queries. It was quite the rabbit hole. Ultimately, here is where I landed: **Avoid tags of any kind.** Instead, focus on creating links within the body of your notes. Try your best to link to a MoC in every note. But other than that, don't stress about it. Trust that you your notes will organize themselves via links and you'll be able to use search to discover what you're looking for.