Selecting topics to blog about can be annual even or quarterly event. Some writers use a blog as a journal, while others advertise. Both avenues are correct, but if you want to gain an audience, you need to offer something. Readers come back if there is something in it for them.
Your offerings need to evolve from an overarching theme. "Be Strategic" is my choice this year. I started out with two ideas in January. Every time a strategic idea burst forth, a new blog draft is made. Sometimes the first draft consists of only a title. Other times the blog begins with sketchy notes or links from researching the subject.
These little "blog seeds" germinate while I write, live, and think. When a blog is due, I read through my blog kernels. I have a bed of ideas to develop. These seedlings also give me more ideas.
Writers think about writing. Place your blog ideas as drafts. Cue them up when you are parched for a a fresh idea.
The link lead to blogging ideas: