Your Close
The last lines of the article are designed to reinforce the theme of your article.
Don't leave your reader hanging. Make sure you end with a definitive statement.
Some closes I've used are:
These four steps may seem simple, but follow them and they'll take you anywhere you want to go.
Commit or perish.
Join me in the problem solving business and you'll never look back.
Take note of the fact that all the closes are straight and to the point.
You're the expert.
End your article with authority.