One additional option that some people like doing is to had a TL;DR (too long, didn't read) section. This takes your entire point of the post and explains it in 3-4 sentences. You can put this section either at the beginning or the end, which ever you prefer. Just make sure to label it TL;DR, summary, or something like that.
Or just do the essay thing and have a summary built into the text.
I technically know all these things, but I so suck at remembering to do them. XD
I don't even do them at all really with my story, except the double spacing. Sometimes I place the image somewhere to break up the text though. I think I might try using some of those stylized line breaks though.
I've been focusing too much on the content, and not enough on the formatting. I do better on my normal posts though. I try to make headers and sections. I could do a lot better though. And I'm gonna try to do so. :)