I subscribe to Tony Moffitt's Art World blog and really find him to be very insightful and knowledgeable.
He posts daily on a wide range of subjects from framing to finding a gallery. The best part is it is all FREE! I hate getting a tease and then having to buy a book or pay for a class to get the answers I am looking for. Tony is also open to addressing suggested subjects from his followers!
You can find his blog here: http://tonymoffitt.blogspot.com/
