13 things to do on Twitter besides tweet In case you thought Twitter was just for sending 140 character messages, Mashable ’s Barb Dybwad has 13 more things for you to do on the micro-blogging site—like exchange business cards. By Ragan StaffJan. 25, 2011 SHARE To read the full story, log in. Become a Ragan Insider member to read this article and all other archived content. Sign up today Already a member? Log in here. Learn more about Ragan Insider.