I have recently started using hister [0] this index’s everything I read and allows me to half remember bits and have a LLM find it.
I realized I really need this when one website which was a treasure trove for PowerMac technical information and assembly guides just went dark. Some of that info I could never find elsewhere. Linkrot sucks if you're in the middle of an (admittedly drawn out) personal project and your source of information vanishes with no trace. Belt and suspenders from now on. Might give Hister a try.
It was painless to set up and quick to use when needed, too.
I also use Singlefile and Obsidian Web Clipper a lot, but Hister has been great and is now a first-class citizen in my system. It helps it works passively for those things that don't look important when you read them, but become relevant later.