Home of Dave Asprey's famous BULLETPROOF DIET™ and BULLETPROOF® Coffee. His website is packed full of great information and his podcast is one of my absolute favorites. Truly unique. Lots of info on the Ketogenic Diet as well.
Probably my second favorite. Home of Mark Sisson's famous The Primal Blueprint, a diet/lifestyle blueprint. A back to basics nutrition and exercise philosophy. No processed foods and no killing yourself at the gym. You'll also find practical information on the Ketogenic Diet.