There are several excellent trade magazines for illustrators,
graphic designers and digital artists. The following lists
examples of a few of those:

Applied Arts Magazine | Canadian
publishes an illustration annual
www.appliedartsmag.com

Communication Arts
publishes an illustration annual
www.commarts.com

Graphis | international
www.graphis.com

How
www.howdesign.com

Print | U.S.
www.printmag.com

CMYK magazine | a great showcase of student work
www.cmykmag.com