Only send email if you have something to say. This one seems obvious, but too many companies start email newsletters with no plan and nothing to say. Email is simply a way to publish content—the content itself has to come first. Before starting a newsletter, make sure it's a sustainable commitment that will help you achieve your business goals. Otherwise, you'll be wasting your subscribers' time and your own time. Ask yourself: What's the goal for this kind of communication? What do we have to say? How will we measure success? Send thoughtful newsletters, and keep the focus on your company's message.
Part of the problem is that people are confused about the difference between ‘strategy' and ‘tactics'. It's essential not to get these two confused. They are related – tactics are a vital part of what makes a strategy work – but they’re not the "be all and end all." Too many people neglect a full and comprehensive strategy in favour of a bunch of loosely-connected tactics. So, to recap:

Do people who share your view see you as more relatable or trustworthy because of your opinion? Not all opinions or even values make much of a (positive) difference. For example, I could point out that I think people should be treated as equals regardless of their gender or sexuality. Most people who agree with that don’t think much about it. It’s such an obvious thing to them. So, telling that doesn’t make much of a difference to people who agree with me. However, many people who disagree with that might think I’m crazy.

The subject line should link seamlessly to your main headline and then to the lead copy and into the body of the email. Ensure that the subject line is relevant to the content and incites a relevant expectation – clickbait is bad, folks! Open rates are not the only metrics by which to measure success (I’ve heard it said that open rates are ‘vanity’ and clickthroughs are ‘sanity’).
Steven, you nailed the topic! Thanks a lot! I am already on my way to your described perfect email marketing strategy. 1. Following tactic of personalization in my messages, because I always appreciate the personal touch myself. 2. Next, segmentation - real assistant for you and your audience, it filters out everything you don't need and everybody that won't be interested in your topic. 3. Mobile-friendliness that's is the point I was never outlined and thought of. So the first thing to improve! 4 & 5 Testing and automation are included in my plan from provider.Thanks again for the content, now I know gaps in my strategy, that I could work on.
You might consider making the language in your alt text actionable, such as "Click here to download the ultimate content creation kit." Actionable alt text will essentially turn every linked image into another CTA. So, even if someone doesn't see the snazzy GIF of my latest offer (or if they hover their mouse over an image that does show up), the alt text will beckon them to click.

This kind of initial research and analysis is incredibly important. If you include anything which you haven’t subjected to research, analysis, insights, experience, and expert opinion, it simply won’t fly. This is important. Everything these days has to be tailored very specifically to your brand and your personal customer experience. Your competitor might have an amazingly successful marketing strategy (and it's good to learn things from what they're doing!), but that doesn’t mean that the same kind of thing would be as successful for your brand.

Digital customer personas summarise the characteristics, needs, motivations and platform preferences of different groups of users. There’s no sure-fire way of creating an entirely accurate customer persona, but it helps if you can encourage customers to describe their own personas. This is possible by offering tools like customer preference centres.
For example, I can safely share that I listen to a lot of music, and I’m almost fanatic about sound quality. I might listen to an album with poor sound quality once, but I probably won’t go back to it. And to be clear, 95%+ of new recorded music has what I consider poor sound quality (due to an absurd standard of perceived loudness, which takes away natural dynamic range from the sound). That said, I’m not a hi-fidelity sound geek. I’m perfectly happy with my high-end studio monitors—I don’t buy $1,000 power cables, $5,000 CD-players, or $20,000 loudspeakers capable of playing back sounds too high for dogs to hear.

Alternatively, at least, an eye-catching design. It’s worth letting a proper designer have a go at prettifying your emails. Customers are often opening emails on the go, so you need to work hard to grab their attention. Making your emails nice to look at is a brilliant way to hold their eye. Netflix put time and effort into making their emails stand out, personally and visually – and it pays off for them!