Look to the categories on your blog. For each category (like a chapter in a book), write down 5 topics you could address that answers a question of your reader or comments on your industry or shows how to do something. Do that for each category and you'll find you have the prompts for many posts. Feel free to connect if you would like to discuss further. I've been blogging and teaching clients to blog since 2004 so I have a lot to say about this!