If you’re trying to build your opt-in email list, consider text messaging. According to a study by ExactTarget, Ball State University and the Email Marketers Club, email subscription via text messaging is the fastest growing list building tactic among marketers. Consumers subscribing to emails via their mobile phones will increase 500 percent this year, the study predicts.
Email marketers also are enabling subscribers to share email content with their social networks. This practice is expected to increase more than 348 percent in 2009.
More information on the study can be found here.