Make your subscribe form visible
Create yourself a subscribe form and place it on a way that can be visible on every web page. There are both free as well as paid services in email marketing. If you can afford a little for email marketing, then you can go with Aweber.
Creating an interesting sign up form
Create an interesting sign up form and create a call to action in into the signup form
Leverage Social Media Power
Social Media is the very powerful tool to get traffic to your email. Use social media networking sites like facebook to increase your subscribers
Be sure to keep in touch with visitors
When someone wants to subscribe to your website and wants to give their email to send your updates, then you must be prompt and keep in touch with them in all ways you can do it. Many companies although they had an email list, they are refusing to keep in touch with the customers regularly. Do not send every mail on a regular basis, but you have to stay connected with them by many ways such as sending regular newsletters or sending regular blog posts, using triggered emails. You can keep your emails updated by sending regular newsletters. You can keep your content fresh in your emails and send them as weekly blog post summaries, bi weekly newsletters and many other ways too. Test which type of content your visitor likes, and at what time of the day they would like to receive.
Create Email automation campaign
To create email automation campaign use email software and set up the software to send a series of 3 to 6 emails and design the pattern of each email to target your goal. By sending well structured emails by the way the visitor loves, you can have more chance of converting them quickly into sales.
Send Triggered emails
Use triggered emails to send a bulk of messages. This method works for shopping cart drop offs.
Ask a question
Asking a visitor about what he wants and decide if he/she interests to continue to your website. Understand what might of information he is looking for and navigate him through the relevant information. If you go through more questions you can get him to the relevant information he wants. Place this question on one of the landing pages as heading to gather more information from them and finally ask them the details of their email.