I was hoping someone else would say this. Some time ago I stopped bookmarking sites in the browser, relying instead on the principle of "if it's important, it's memorable"... then I stumbled upon Paul Bourke's page (while looking for a document/date overview for MacPerpective of all things).
I call it the 3-interest rule. If something comes up that I find really intriguing 3 times in a row from 3 independent and reliable sources (books/wiki/long form article/comments) - then I go into deep investigative mode.
I try to soak up as much as I can - not bothering too much with bookmarks because I'll never come back to it in that fashion (I'm driven by slow-burning interests/big problems in my field I always think about coupled with short bursts of deep random investigation into diverse fields that aren't my forte) and trying to integrate as much as I can within my current mental models before moving on to other subjects and only returning when the 3-interest rule is breached once more (it always has with everything I've investigated).
For example: Automation and the reversal of globalisation has come up a few times from various high signal-low volume sources so I went in deep and have concluded that China is dead and the future doesn't need humans - at all (extinction level event).
I just kinda fell into this mode, and this had some effect on my habits:
