Ethel Hills asked for recommendation on art business magazines.
There are only a small handful of magazines focused on the business of art. Professional Artist is up near the top and The Crafts Report (now Handmade Business) as well. Sunshine Artist is good for those who do art festivals. But nothing more detailed than those three selections. I think there is more for graphic designers. (Feel free to leave your own or different recommendation below.)
There comes a time when artists will eventually outgrow these selections–a time when the business of art means keeping up with what is going on in the venues to which you aspire and the artists who are showing in those venues. Of course, I hope you can do this simultaneously with studying the business aspects of being an artist. They're very much inseparable since part of being good at your business means keeping up with what is current. To do this you will read publications like ARTnews, Art in America, Modern Painters, Fiberarts, Metalsmith, Ceramics Monthly, Sculpture, Southwest Art, and the like (depending on your media, your goals, etc.).