Good writers supposedly know how they will end an article before they start. Enders were always my burden (as in this gratuituous photo of a 15th=century stone sculptor). 

From Medium, here is extensive help, by Jason Shen, filed for my personal  use and perhaps useful to you.

How Great Writers End Their Articles: What you can learn from the final paragraphs of 100 top feature articles from Malcolm Gladwell, the Atlantic, Fast Company, and the New York Times