WebmasterWorld is the largest SEM forum on the net, probably one of the largest forums on the net period. WebmasterWorld Moderator and WebmasterWorld's founder's wife, Hawkgirl (Erika), has basically summed up some of the most valuable threads at WebmasterWorld. She did this, in addition to other things in a thread named Welcome to WebmasterWorld! Which she subtitles, "A guide and resource for our new members".
Even if your not a newbie to WebmasterWorld, the thread (towards the bottom) has some goodies that you might have missed.