Hi Happy,
There are writers e-zines that post announcements such as yours. Writer Gazette is one that comes to mind immediately. I think they let you post an announcement for free. WritersWeekly.com has some good marketing and promotion articles as well. And I like Dotsie's advice about thinking about what you do on a daily basis and discovering ways to promote to the people you are already involved with. Most of all, believe in yourself. I failed in that area and didn't do much promotion on my novel.
Best wishes,
Marie