I'm a happy customer of the Pinboard bookmark service. I was grandfathered in on the original one-time payment plan, and even recently converted to a regular subscription when he politely requested I consider it.
The thing is… I hardly ever use pinboard! Bookmarking just isn't on my radar these days; that's what search-engines are for.
What I've long wanted though is some sort of serendipity in the service. I don't have a problem locating something again if I remember what it was, but I have no idea what I've since forgotten about. As I discovered in my last post though, now I know that it's a fairly simple job to implement a "random links from your past" email.
In readiness, I've tried to be a lot more cavailier about bookmarking anything that seems remotely interesting. I have a few "interesting links" emails in my Inbox these days (Digg, Refind, etc) that try to use social cues or AI to find interesting stuff… now I have one more, but based on stuff I've personally and explicitly already marked as interesting!