I have a Shaarli instance which I used for hand-crafted bookmarks (when I remember). Although I have been bookmarking less frequently recently, I have remained been pretty good about tagging.
Bookmarks
Diigo
Almost everything I bookmark still goes to Diigo (manual bookmarks, links shared on Twitter, and via IFTTT recipes). I liked Diigo because of its capability to highlight passages within pages. I used to do my best to tag my bookmarks, but with the autoposting and my lack of attention to curating, it has become rather unwieldy…