There are number of other websites and tools besides Twitter, FaceBook, and Google+ that are ideal for establishing relationships online. Many of these sites allow writers to find a highly targeted segment of Internet users to share ideas and get feedback. The sites can also be used to reach people who might be interested in purchasing your books, photobooks and other Lulu.com content.
Plurk is a great site to find people with similar interests. The service is similar to Twitter, but enables conversations to be followed much more easily.
Tumblr is another micro-blogging site to share text, photos, quotes, links, music, and videos, from your browser, phone, desktop, or email.
Pinterest is a digital bulletin board that you can post likes and interests to for seamless sharing with others. This is a great place to recommend titles you like yourself, and casually mention your work.
StumbleUpon is a perfect site to find sites that match your exact interests. You can surf sites on any topic and easily add your own favorites and your own Lulu content easily. It is not uncommon for StumbleUpon to generate thousands of views of a single web page.
These are just a few of the many sites and tools available to promote your Lulu.com projects. Feel free to add any other ones you like to use, or links to your pages, in the comments section.