Casey’s General Stores Inc. is launching a new social media marketing campaign aimed at increasing interactions among the company and its customers. Beginning on Feb. 14, fans of the convenience-store chain will begin “declaring their love” for Casey’s brand via text, photo, video and other digital forms of communication on Facebook, Twitter and a custom website. The fan who shows the most creativity, humor and brand enthusiasm will win a $1,500 Best Buy gift card and be named Casey’s Madness champion. For more information, go to www.CaseysMadness.com.