Looks like we don't have to look far to get content idea. Steemit itself is a source of content idea. You can find what people are talking about your niche, you can write a blog post about that. You can make a post answering your others' questions. While you're reading, you can get an idea to write about that no one wrote it before.

Thank you @modernpastor for your suggestion about finding new content and get inspired to write a post!