> If it's not worth that, then I just keep a bookmark.

I've made a habit of saving every page I bookmark to the WayBackMachine. To my mind, this is the best of both worlds: you'll see any edits, additions, etc. to the source material and if something you remember has been changed or gone missing, you have a static reference. I just wish there was an simple way to diff the two.

I keep meaning to write browser extensions to do both of these things on my behalf ...