First of all I would identify the target market for the product. If at all the target market exists then identify if any other prospective target market could be there apart from the existing one. I would approach a celebrity to endorse it. I would also organize roadshows to publicize the product and approach the media as well. As they say 'Charity begins at Home' , so I would spread the word about the company product (name the product) to my family and friends and recommend them to use it. That would be a simple 'word of mouth' promotion.