How do I publish a blog post in more than one location?

I'm looking to have a blog post appear on my homepage but also under the subcategory.

For reference, a perfect example of this is zenhabits.net.

I've gone through the Live Chat help and they first suggested a 'summary box' but this is not what I'm after as I want the whole blog post to appear on the homepage - not just a summary of it. They also suggested 'embed'. I tried this but with no avail.

Any help would be highly appreciated!

Double publishing is not an option automatically. The closest thing to that would be a  summary block on your homepage which pulls a thumbnail and an excerpt of text  from a featured blog post usually, the newest one. Otherwise its copy and past into a text block on your home page each time you make a new post with a link to the rest of your blog or you make your blog your home page, which I suspect the Cloudflare hosted site you posted did just that.  It isn't really posting in two places at once, that  is my guess anyway.  

Thanks so much! That's very helpful. Much appreciated 🙏👍