The (real) founder of the Web is asking us to do something - so we should.
We need to share more "linked data" - actually data about data. Get it? Yeah, I know the deluge is overwhelming. But if we allow (and insist on) more definition to the stuff we want, then we get less of the stuff we don't want.
Simply, enable some type of comments or votes on all of your content.
The most popular way is to accurately tag your posts like I just did for this one (see "Labels" below). Flickr is all over this with crowd-sourced photo tagging and even group comment games.
Get the power from Tim's good rant about database hugging... unlock the raw data now!