A picture’s worth a thousand words, so if you want to show a thumbnail of each article hit the return key to get a new line, click on the + sign and then select the third icon to the right (add embed). Then you paste in the URL to your article and hit enter or return. It will look like this:
I learned that formatting trick from alto.
Another thing I liked about some other people’s archive posts were the Easter Eggs I found on Matt Pfeffer’s post.