MOZ has some of the best content, here’s a great one on using an Inverted Pyramid, techniques for blogging eg. help with SEO.
How to Write Content for Answers Using the Inverted Pyramid – Best of Whiteboard Friday – Moz
If you want a quick hack to write content for featured snippets, this isn’t it. But the inverted pyramid method of writing *can* help you craft intentional, rich content that will help you rank for multiple queries and win more than one snippet at a time—learn how in this classic Whiteboard Friday featuring the one and only Dr. Pete!