I think the object of this part is to create a list of people's emails so that you might have a database of people to sell things to. The easiest way to create this email list is to offer them something free. That way people will be willing to sign up for your free whatever it is that you want to give them. Once you create a little form for them to put their name and email into, then you give them the free thing. It could be something they download, or it could be something tangible, such as something physical you send in the mail. It would be more expensive to do that, but the way you get around that is to do a raffle. If you offer something really good, something that costs money, like a gem or a ring or something similar, you could raffle it and still, people would be willing to give you their email just for the act of getting in on the opportunity to win the ring or the gem or whatever it is you would like to raffle. It could be a "Fidget Spinner." It could be anything.
Even if you haven’t collected subscriber information via an email sign up form (such as one on your website or blog), you can use information collected from your CRM or e-commerce platform to personalize your campaigns. For example, Salesforce might tell you which individuals live in a certain geographic area based on their billing address. You can then use this information to send emails that are tailored to a subscriber’s physical location, which is useful if you’re promoting an event in a particular city.
Couple your sign-up boxes with a clear description of “what’s in it for them.” Let customers know exactly what to expect when signing up, and sell the benefits for being on your email list. This can be as simple as promoting the general advantages of the channel — such as being able to receive information and offers faster and that it’s eco-friendly.
For effective and actionable results, you should do A/B tests, which test two (or more) different approaches. For example, you could send half of your list one subject line, and an alternate subject line to the other half. You could also A/B test the two approaches with a small subset of your list, then send the winning headline to the rest of the list.