A trade organization with the goal of connecting practitioners and academics; their site has fee content, but also good free resources like a marketing dictionary, white papers and short articles on trending topics.
This website has a lot of short articles that work as starting points, linking off to other sites with more information on marketing topics aimed to address marketing professionals, educators and students.
Site is full of practical, how-to guidance, insight and advice from the experts, and an active community for discussing the latest news, information, and advances that are moving the industry forward. Awesome articles.