Despite the fact that the 25-and-under crowd prefer texting over e-mailing any day, e-mail marketing is still alive and well for the rest of us dinosaurs. There are likely event attendees who don't have a Facebook page and haven't even heard of Twitter, but they more likely than not have an e-mail account. So consider e-mail marketing one of your most important social media tools for planning your event. Sign up with e-mail marketing platforms that allow you to easily format your message and send it to your list with the click of a button. You can also use their tools to keep building your list throughout the year.