1. Consulting-Give your customers advice on topics related to your product or service. You can consult via e-mail, message board or chat room. 2. e-Book-Compile related product information or instructions into an ebook. You could publish it in text, pdf, html or exe format. 3. Customer's Only Discussion Board-Make a place online for your customers to communicate about your business or similar information. 4. E-mail Newsletter-Publish an informative e-zine that keeps your customers informed o.