http://www.amazon.com/The-Writers-Tune-up-Manual-ebook/dp/B00DPEHPR4/

One thing every writer wants is the opportunity to improve their craft, to hone their skills, and create the most dazzling prose possible. The Writer’s Tune-up Manual is just what you need. Maybe you’ve been away from the game for a while, struggle with a certain aspect of writing, or perhaps you just want to put your skills up on the rack and give them a good tuning. Filled with 35 targeted exercises, The Writer’s Tune-up Manual will help you do all these things by expanding your writing savvy in five specific areas: Character Development, Dialogue, Point of View, Description and Setting, and Plot.