Information hoarding was my big problem as well. To fight it, a few years ago, I stopped using any bookmark services, and I started to keep a list of links in a markdown text file with a limited number of tags. I split the links by month and often add a short description and a tag to a saved link. All IT tags are textual, but I use emojis for other link categories, such as music or books. Example content:

### 2022/12

- {musical note emoji} [Mendelssohn - Complete Piano Works](https://www.amazon.pl/Complete-Piano-Works-Prosseda/dp/B084D...)

- [Checked C](https://github.com/microsoft/checkedc) - extensions to make C safer #cpp

- [SQLite Internals: How The World's Most Used Database Works](https://www.compileralchemy.com/books/sqlite-internals/)

- {book emoji} [Ask HN: Best books read in 2022?](https://news.ycombinator.com/item?id=33849267) - some interesting pieces here

### 2022/11

- [The Linux Kernel Module Programming Guide](https://sysprog21.github.io/lkmpg/), [repo](https://github.com/sysprog21/lkmpg) #linux

...

And so on. I know it's simplistic, but it helped me a lot to keep the number of links under a reasonable limit, and it is effortless to search through.