Maximum effort blogging is the ideal, although it may be at odds with publishing multiple posts daily. Perhaps this depends on the community and the topics covered there.
For posts which tend to be long, it helps to break up text with other elements such as various headings, lists where they make sense, one-column tables to highlight a point or to make an aside, and other creative uses of Markdown and HTML. Images help, too, but aren't necessary except for perhaps the cover image and horizontal rules.
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Absolutely, in fact my latest article is precisely about that!