I would consider myself a pretty good photographer and I have some experience but Ive never really got into flash. Im getting an Sb-600 today and im wondering if there are any sites I should visit to get tips and tricks on how to use it?
Also get his book on on-camera flash. When you are ready to get your flash off camera, then look at the Strobist site already mentioned, and get Niekerk's Off-Camera Flash book. Also get a copy of the "Speedliter's handbook" by Syl Arena, which although aimed at Canon users is 80% applicable to all flash use and is hands down the best treatise on the subject ever written.