The Problem with Newsletter Advice — CJ Chilvers:

The good advice for business (and life) is boring and readily available.

• Deliver value.
• Save money automatically.
• Diversify.
• Strive for more agency in work and life.
• Be kind.
• Be generous.
• Put family first.
• Without your health, nothing else can happen.
• And so on…

CJ talks about newsletters, but does a nice abstraction about the key elements of doing a successful one. Newsletters have been around for centuries.

Nothing has changed but the means of delivery. [edit mine]

Also true for life.