How do you get noticed?

We are all in the same boat in the Ebook publishing world. As indie authors we have cast our books out like so many lures and hope the readers will bite. Although I am an experienced writer I am new to the publishing and marketing game. So far my marketing strategy has centered around social media and blogging. I have met with some success but am always craving more. Since joining the discussions on the KDP discussion board my sales have nearly doubled, but I don’t know if it is because of the postings or if it’s just a happy coincidence. So, my question to the readers of this blog, what do you use to hook your readers? How can I reel in more sales? (Sorry for the tired fishing metaphors).