Another important tactic here than many marketers miss is making sure you optimize your landing pages and emails for social sharing. In other words, in addition to actively promoting your own landing pages, you want to be encouraging the folks already on your email list and those who have downloaded and enjoyed your content to share it with others (on social media networks, or by forwarding the email to a friend or colleague), thus allowing you to add new contacts to your list. With valuable content, good reach, and clear and enticing calls-to-action, this is a great way to grow your list even further.