If you’re into book promotion, I strongly suggest you sign up for HARO (“Help a Reporter Out”), especially if you write non-fiction.  This is a free service that links journalists with sources, and a great way to uncover interview opportunities.  But you must be very thoughtful in responding to queries and tailor your response so that your message stands out to increase your chances of being selected for an interview.  For tips on the right way to respond, go to one of my favorite resources, Build Buzz.