Unfortunately, the word strategic is thrown around, chewed up and slobbered on more than Fido's favorite tennis ball. But it's the perfect word to use here. If your newsletter is a collection of articles with no greater purpose, goal, direction or service, there's no point in publishing it. That's what we mean by strategic. Connect your newsletter to every business goal, and clearly map out how the publication will carry out those goals, and what content is most appropriate to do so.
Writing is much more than words on a page.
Like effective strategy, writing is a craft. The concept you start with, the words you use, the psychology you engage, the sentence cadence, the copy length and the tone are just some of the factors that help ensure readers' understanding of the information you're sharing. Don't create a newsletter based only on an opinion. You'll rarely, if ever, hit the mark. Regularly ask your audience what they need in terms of information, and how they like to receive it.