From Further, the wonderful personal newsletter of Brian Clark:
"Psychologist Dean Simonton’s work focuses on creative productivity. His studies reveal that highly creative individuals don’t necessarily produce better ideas over all. They do, however, come up with more ideas."
"Simonton has also found that highly creative people don’t even know which of their ideas are the great ones. You’ve got to produce a lot of ideas and put them out there to discover which ones resonate."
That should be the idea behind every personal blog or newsletter. This is the place to see what resonates with your audience and yourself. This is the place for experimenting.