Checklists are one of the most simple types of content to make. You probably make lists all the time such as your grocery list, supplies lists, to-do lists, etc.
All you have to do is take that same concept and apply it to your industry or blog.
If you are in real estate, come up with a checklist for an open house.
If you are in photography, write down your engagement session checklist to make sure you have all that you need for the perfect engagement session.
To perfect the checklist, take a common task and break it down into short, actionable items.