I'm still a big fan of delicious. It's not just having my bookmarks decentralized and tagged, but also since it's easily accessible I can share any tag set with anyone I know.
I basically use it as a mass dump of everything I find remotely interesting on the internet. I just give links enough tags so I can find them again. That way I can use it as a first buffer before doing a full on search. If I want to find a chocolate cookie recipe I can just type in the tags "recipe cookie chocolate" and if I've tagged a recipe like that before I know it's quality because I've tagged it before. Even if I don't remember tagging it.
I basically use it as a mass dump of everything I find remotely interesting on the internet. I just give links enough tags so I can find them again. That way I can use it as a first buffer before doing a full on search. If I want to find a chocolate cookie recipe I can just type in the tags "recipe cookie chocolate" and if I've tagged a recipe like that before I know it's quality because I've tagged it before. Even if I don't remember tagging it.