I also like the forum type discussions, as they do give a 'country wide' aspect as to wiring, which has been a real eye opener. I also take about 4 or 5 different type of classes a year offered by the NFPA and IAEI. There are local classes set up and I take them as well. I spend an average of two weeks in some kind of class a year - with the classes and the forums, one day I may have a chance of understanding some of this stuff
I also have purchased about 30 books from these sites and they also help as ready reference. The magazines that are available are another source - with most being free. And of course the endless source of the internet - except you need to be more careful of the information in some sites.