http://www.webmasterworld.com/
Webmaster World is a damn good site. I have been lurking, reading, posting and pondering there for 5 years now. Seems like it is not that long, but I guess i am getting old. At first I was highly annoyed at the insistence on anonymity. For example, when discussing a site problem, you must use a generic name like widget.com to describe the site.
It seemed stupid at first, but then I started poking around at other webmaster sites and found them cluttered with way too much spam and self promoting url-drops. Very annoying and then I understood the point of “widget .com” . So go there and learn - and read the charter so that you don’t get smacked too often