Define your business blog's goals and audience
A business blog can serve very different purposes depending on the business. Before writing a single post, define:
Who are you writing for? Not "small business owners" but "solo freelancers who design brand identities for consumer product companies." The more specific, the more useful your content.
What do you want the blog to do? Options: generate leads (content that attracts potential customers), build authority (demonstrate expertise to existing and potential clients), support SEO (organic traffic to your main site), retain customers (educational content that helps existing clients succeed), recruit talent.
What will you write about? The Venn diagram of: topics your target clients care about + topics you have genuine expertise in + topics with search demand. This intersection is your editorial focus.