·         do nothing. It was a good article, but your client has been in the industry for 15 years so it would not be anything new for him.
·         call your client and tell him about the article, what you thought would be beneficial to him, and engage in additional conversation to see how you might be able to further help him grow his business.
·         send your client an email and explain that you, “just wanted to say ‘hi’.”
·         send the article to your client’s competitor with some insider notes on what you did for the client. This might be a good opportunity to get his business.