If you would like to publish more posts — that is, to have a blog or journal, or other collection of writings apart from the Highlights, you can use Categories to separate these collections.
When publishing your post, add a category on the right-hand side like “Highlight” or “Blog” or “Journal” or “Notes on Acting.”
You can still link your Highlight to a grid entry as you ordinarily would. But if you wish to have each Category of posts appear as a distinct page and a unique option in the menu on your site, go to Customize > Menu and choose Category, adding each one in turn. This way, visitors can browse just your highlights, or just your journal, or just your notes on acting. Screenshot below: