For all those people saying "I don't maintain a bookmark collection because when I re-access, Google will find it" I do have bad news: as it turns out - by evidence, not by proof - Google does not index older parts of the Web.
From a technical perspective, this is absolutely understandable. However, from the viewpoint of an ordinary user who expects Google to remember or locate everything, this is a pity because it is a false assumption.
Either you maintain an easy-to-use collection of bookmarks by yourself or you switch to different search engines who still find older stuff.