Even though one of the most commonly cited fears of newbie bloggers and newsletter publishers is "What will I write about?" — I believe this isn't the real problem.
Once you get the hang of blogging, and you've developed your posting wings (2-3 times a week), the real problem is filtering out an excess of information. You must narrow down your focus. Weed out all the dead rabbit trails.
This is the real problem for most of us. I call it Reverse Writer's Block. It's when you have so many ideas and resources and things you could write about, you grind to a full halt.
The real question becomes: what business am I in? What am I in the business of selling? What do I want readers to spend money on?
I'm not denying that writing clever blog posts and newsletters that showcase your expertise isn't foremost. Nor do I diminish the quality of relationships intended in your content. But if you're in business, I'll assume that you have something to sell.
For myself, I sell executive coaching newsletter and content services. I also sell my services as a business blog coach and content marketing writing coach. And for some reason, I'm blogging mostly about content marketing and business blogging.
I neglect to write about the part of my business that brings in 50% of my revenues, Content for Coaches and Consultants. I think it's because it's a specialized niche business that might not interest the majority of my readers on this blog.
I'm thinking about changing that. Maybe I'll start sharing some of what I'm doing for executive coaches and consultants. After all, it's all about content marketing and the principles for one niche are applicable across a wide field of professions. Tell me what you think.