Ask HN: Extracting insights from personal knowledge database?

I've built up a solid personal knowledge database using Obsidian. It has book/articles summaries, phrases that resonated with me (at reading time), tons of links to interesting websites, new project ideas... I have a folder hierarchy, tags, and also use visualization tools from time to time.

It's mentally gratifying to see all this well-organized, but I'm struggling to extract meaningful insights from this.

How do you synthetize all the knowledge in these databases? What useful meaning/insight/actionable items do you extract from them?

Can LLMs help here?