I’ve tested the Welcome Mat and Smart Bar apps as well but they didn’t produce anywhere near the conversion rate of the List Builder and Scrollbox apps (note: that doesn’t mean you shouldn’t test them on your site… it’s just that they didn’t perform that well on our site with the setup we used so we removed them so not to distract the visitor too much while we figure out new ways to test them).
Customer reviews are the "social proof" that encourages people to join in on something. It's one thing for you to tell people to sign up for a campaign, but it's another thing for your happiest customers to say it too. Publish your best reviews from communities like Yelp right to your website. This adds genuine value to your landing pages when people are on the fence about submitting their contact information. 
If you don’t wish to adopt any of the above-mentioned strategies to build your email list, you can also use blogger outreach programs and software that help promote your company, product or service. They post about you on their site in exchange for product, payment or any service, as a result of which you get mentioned in several places online which is likely to create email traffic for you.
For subscribers who may have been on your list for a longer period of time, a small incentive or discount will often get them talking. Marketers should capitalize on word-of-mouth marketing by incorporating email sign-up on viral components, such as features that allow site visitors to forward products, services, wish lists, information online, notifications and more to their friends.
It’s important to note that you won’t be collecting names or sending out emails by hand, one email at a time. You’d soon be overwhelmed by the volume! You can use systems like Constant Contact, Get Response, AWeber, and Campaign Monitor to manage your email lists and broadcast your emails. Systems like this can also track leads, opt-in rates, sales, open rates, click-through rates and other important stats.
Appropriately ending our discussion of opt-in forms is the exit-intent popup. As the name implies, these pop-ups show up when users display a behavior indicating their intent to leave the page. Triggers for exit-intents can be rapid mouse movement toward the top right of the screen (where the close button typically is), clicking on off-page links, set on a timer, or activated on scrolling.
You can’t begin to personalize your campaigns if all you have is an email address, so work to figure out what data you already have. Do you have information on past purchase behavior, length of time on your email list, customer status, or geography? All of these areas can be leveraged for personalization, which will, in turn, improve list quality. Where does this information live? Is it in your CRM, e-commerce platform, or somewhere else? Integrations can help you combine your email list with outside information.
Getting your messages to your customers’ inboxes should be your main goal for any email marketing campaign. According to ReturnPath’s 2016 Deliverability Benchmark Report, 21% of email routinely goes undelivered, so you can’t afford for email acquisition practices to negatively affect your deliverability. To help you achieve your goal, there are a few best practices you should follow to keep a clean subscriber list.
Customer reviews are the "social proof" that encourages people to join in on something. It's one thing for you to tell people to sign up for a campaign, but it's another thing for your happiest customers to say it too. Publish your best reviews from communities like Yelp right to your website. This adds genuine value to your landing pages when people are on the fence about submitting their contact information. 
One of the first dilemmas that you'll need to deal with when you begin to build email list is the quality versus quantity debate. Obviously, the larger your email list is, the more potential you have to generate revenue from it. However, as with most marketing activities, the quality of your leads is equally important. If you create a large email list by porting over old contacts or by buying or renting a large list, you may have a great number of email addresses. However, you may have very few email addresses that are actually leads who are interested in interacting with your product, company, or brand. That's why it's often a better idea to start slowly and build email list over time. Focus on getting the best quality leads on your email list and then let the numbers grow as your business grows. While you ultimately do need to grow the largest email marketing list possible, you also need to grow a quality list that will respond to your offers and increase your company revenue.
To be honest, this is the first time I am on this site. I have been blogging since early 2012 but never paid so much attention on list building like I am doing now. Anyway I was just checking few articles (mainly how to guides) on list building. Landed on this page and now I know some of my mistakes that I have been making to create a list. Thanks for all the tips and they are really helpful for me.
Create as many subscription widgets as needed and test their performance across your sites. The subscription widget’s intuitive drag-and-drop editor allows customize your forms with a few clicks of the mouse. Edit the layout, text, image, and color scheme order to fit your brand’s visual aesthetic. When you’ve landed on a design you’d like to use, the tool will generate an HTML code to be copy and pasted into your website’s source code.

Well Carson, fantastic information again and very done on the tutorial if I may say so. I'm still working on my site and in the process of finishing my review on Wealthy Affiliate and then at same time in the process of integrating and auto responder into everything. I have a real bad habit Carson, well more than one really, but the one I'm talking about is "multi tacking". I'm going to have to put a stop to that someday. I book marked this one for sure so I can go back to it later, thanks for this one again.
It’s a best practice to ask the referrer not only for a friend’s email address, but also for a full name so that the message is personalized. Most important, remember to add the referee’s full name to the email as well. By referencing whom the email content was recommended by, you gain instant credibility and will attain much higher conversion rates.
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