Once upon a time, I bookmarked everything interesting that came across my path to delicious (back when it was del.icio.us). It was part of my routine, and a daily summary was posted through to this blog.
Delicious was from the tags era of the Internet, where in addition to noting that a thing existed you could add your own tags to describe it. Sometimes these were straightforward tags, like the 1533 pages I marked as "annarbor". Others were idiosyncratic, like the 5 pages I marked as "attention-to-irrelevant-details".
There are other, better ways to bookmark things so that lots of people see them. The facebook "like" button gets more page views without consuming any cognitive overhead about how to tag, whether to tag, and what you've tagged before. Actually writing about something is quite a bit better than just bookmarking it, because you get to be yourself for a little while and not just an automaton forwarding on links automatically.
Every bookmark I ever did on delicious, up until now, is archived for posterity here: vielmetti.typepad.com/vacuum/delicious-20101216.htm . As I review it, there really should have been more of them marked "attention to irrelevant details". It's hours of reading, though some of it goes by fast because the site that was linked to has disappeared, leaving only the bookmark and whatever clipping I managed to care about.
edit: now with more cognitive overhead
Les Orchard, Let a million bookmarks bloom. "Use the web. Host your own, pay for it, or find someone who values your data."
Stephen Hood, We can save Delicious, but probably not in the way you think. "The Delicious user community could organize to save the data themselves via a coordinated harvesting project."
Edward Vielmetti is http://www.delicious.com/vielmetti.