Promotion-wise, I'd read up on ARCs and how to make the best use of them.
If you need help with structure/plotting, here's a killer book by Cathy Yardley: http://www.amazon.com/Rock-Your-Plot-Plotting-Writing-ebook/dp/B008CC5L8Y/ref=sr_1_1?s=digital-text&ie=UTF8&qid=1439327332&sr=1-1&keywords=rock+your+plot