If you don’t know the conversion rates on your optin page, then setup split testing. I recommend Leadpages for setting up your optin pages because they have built-in click tracking, A-B split testing, and they let you drive unlimited traffic. Of course, they have some beautiful optin page templates that you can edit very easily using their click-click interface.
You can also voice opinions that repel people you don’t want to work with. For example, I’ve shared that I don’t like working with people who don’t take responsibility for their own life. If someone’s more likely to blame outside factors for their misfortunes than look for things they could do to change the situation, I won’t have a good time working with them.
Location: Businesses that offer local service, such as a lawn service company, obviously need to target local customers, but regional, national, and global companies can also benefit from location-based personalization. Consider running special campaigns for customers in a specified location based on regional events or what’s happening at your local office.
Essentially, a customer has greater ‘lifetime value' the more that they interact with their brand. Some actions (purchases, for example) have higher ‘value' than others, but all engagements add to a customer's LTV. Evaluating CLTV will help you to identify existing high-value customers and potential high-value prospects moving forward. This, in turn, will enable you to refine your message and target it where the true value lies.
Their email marketing strategy and plan was to optimise their email subject lines because this was the first place that their customers would engage with. To do this, they used an AI generating subject line tool called Phrasee. There are plenty of increasingly sophisticated AIs out there which can do this kind of thing. Phrasee worked for Dominos because it capitalises upon being specific to brand voice, and is optimised to drive action.
Ask for the right information upfront: Great personalization starts way before you hit the ‘send’ button. It all starts with your sign up form. Without data such as name, company and location, you will be very limited with your personalized communication. Remember to only ask for the information you need, rather than the information you want. This is one of the ways that GDPR has impacted marketing teams.
Sometimes low-hanging fruit is as easy as it looks. Personalizing emails, as well as segmenting them—a marketing technique that teases out your subscriber list to send relevant emails to specific subscribers—can offer significant returns. Segmenting emails allows you to target specific groups of subscribers, which leads to substantial increases in click-through rate.

When you're using email as a marketing tool, you're working on a pretty personal basis. This isn't ‘drive-by' stuff -you're directly targeting customers from their inboxes. There's a huge amount of potential which comes with this kind of marketing... but you'll only reap that potential if you REALLY understand both the marketplace you're operating from, and the audience you're talking to.