Iíve been blogging for a while, and the thing that moves your site up the Google chart is activity. I do it for fun because Iíve found a new topic Ďgolfí that Iím motivated to share my experiences with whomever wants to read about them. However, itís a chicken and egg problem, without content providers you wonít get the attention of Google; and without moving up on Google, you wonít attract new contributors.
I would just add that it is hard to get Pros and beginners in the same room.
Good luck though, because Iím having fun posting about my misadventures.