I read Vintage Guitar magazine as a physical object posted to me from the States, which I think is the best mag out there, especially if you have an interest in the history of the instrument. I read Guitarist and Guitar World on the iPad and I skim both. It's much cheaper on the iPad than buying the print editions and, if I had to pay what the print editions cost online, I wouldn't bother. Otherwise YouTube covers most of what I need, plus the links posted on knowledgable forums like this this one.