Summarize this article:

Make a monthly newsletter that tells potential customers something that they may want to share on social media or with their friends. Include social media links and a “Forward to a Friend” button on your HTML email program, such as Mail Chimp. Try a tutorial, expert tips or industry trend information. Ask experts in your company to craft these emails. The best way to increase an email list is to create quality content that is only accessible by people who have an account. The customer will give you their email in exchange for free, valuable content.  Create a landing page on which you can capture users and sign up new accounts. Once the account is created, the landing page should lead to the content. You may need to enlist the services of a web programmer to do this. Valuable website content may be in the form of an eBook, video, tutorial, free template or free download. Announce the free content offer on social media sites, your website, monthly emails, in print ads and in Google ads or other links. Start a Facebook, Twitter, Pinterest and/or Instagram account. Share your valuable content and lead people to the landing page on your website. Your email program may provide you with a coded button that will allow people to enter their emails to sign up for your list. If you are sending out valuable content, new people will want to join your list. Create a landing page where people can enter the contest by providing their email. Make sure you have a valuable prize and that you follow contest legal guidelines that are dictated by state commerce agencies. You must keep a schedule of sending valuable information to your email list in order to keep the list growing. Once you are set up to capture emails through your website, social media accounts and email management program, you can move on to more advanced list-building strategies.
Create valuable email content. Create valuable website content. Use social media to share the valuable content. Post a “Join our Mailing List” box on your homepage and email signatures. Host a contest. Remain consistent.