Have you converted any of your books into audio books? Supposedly audio books are the “next big thing,” although I’m not sure who decides that. In any event, I have been converting quite a few of my books to audio and have been having a lot of fun in the process. I’m doing this through ACX, and I’ve written here before about how that process works.
One thing that I particularly like about ACX, as well as the meeting place they provide so authors and narrators can hook up, is that they continue to send promotional ideas via email. One such email introduced me to AudioBook Boom.