The problem
To keep things easy to find, it’s nice to only have pages in your page picker and query results that actually have content.
I used to clean them up by finding them in the command line with commands like ls -l. But after I accidentally deleted the wrong files using rm*, I wanted to find a better way.
* No actual files were harmed in this process. I had backups. 
The solution
On my index page, I have a little section with this simple query that shows me any pages that don’t have (much) content yet. I can easily navigate to them using the projected Wiki Link and run the delete command.
# Empty Pages
${query[[from index.tag "page"
where size < 20 and size >= 0
select {
Page = "[[" .. ref .. "]]",
Created = created,
Modified = lastModified }
order by created]] or "No empty pages."}
Just wanted to share this quick snippet with you, folks. Perhaps it will be useful for anyone else. 