1. Invite old customers. Send out personalized email to your customers and ask them to signup.
2. Offer free gift, free whitepaper or discount coupon to subscribers
3. Place email signup form on your home page
4. Place email signup form to footer or navigation menu of your website
5. Place a link to the email signup form in email signature
6. In “Contact Us” form, add a check box to “Email Signup”
7. Ask for email addresses at the point of sale.