Another way to uniquely promote your book and create more sales is to do interviews. Opportunities to do radio, newspaper, and magazine might be more realistic at first. However, do a great job and you may be invited to do a podcast or television interview.
Many of us are members of Goodreads—if you’re not, you should be! This site invites author interviews after a short submission process, including writing a short blurb about why the author feels his or her interview would be interesting to their readers. (Is there something unique about you or your writing that readers would like to know about?)