What I've done...

Had the article framed and put it up in the office... in your case, your store.

Send the article with a cover letter to all your clients, friends, colleagues, etc.

If you're a member of an organization, make copies and when you network, give out a copy of the article.

Make copies and give them out in your store to clients who walk in.

Include the article in Christmas/Holiday cards.

Send the article out along with two discount certificates (one for your client, one for a friend).

Just a few ideas...

and Congrats!