There are so many ways to promote your book, but sometimes it is very simple book marketing changes that can make a big difference to your book sales potential. Often the common problems with online book promotion is that it can become repetitive and potential book buyers become advertising immune.
The problem of repetition is especially the case on Facebook and Twitter. If you are using social media to promote your book, it might well be time to think about creating alternatives that you can post to create more variety and interest.
Via http://www.justpublishingadvice.com/how-to-promote-your-book-five-more-new-ideas/