Dollygrippery is a great resource for all you Dolly Grips and wannabe Dolly Grips. I fall into the second category, barely. I usually tell people that I'm every kind of Grip, except a Dolly Grip. After checking out Dollygrippery, I think there might be hope. There is a wealth of info on the craft including Tips for New Dolly Grips (My Fav:"Endeavor not to suck"), Wedges or Pads and What's in My Toolbag.
Plus, there's stories about set life, equipment reviews and other tech goodies.