A tiny bit of forethought, some cautionary design.
A personal email newsletter ought to be divided into seasons, just like a TV show.
Here’s what you get from the nomenclature, the metaphor, of the “season”:
a sense of progress: of going and getting somewhere.
an opportunity for breaks: to pause and reflect, reconfigure.
an opportunity, furthermore, to make big changes: in terms of subject, structure, style.
Constraints are helpful. So is going into a project knowing that it will end and loosely when that happens or what it looks like. Predefines an ending or at least an opportunity for one. I like this approach.