Die Empty: Unleash Your Best Work Everyday by Todd Henry
First Things First by Stephen R. Covey
Getting Things Done: The Art of Stress-Free Productivity by David Allen
Manage Your Day-To-Day: Build Your Routine, Find Your Focus, and Sharpen Your Creative Mind, edited by Jocelyn K. Glei
168 Hours: You Have More Time Than You Think by Laura Vanderkam
7 Secrets of the Prolific: The Definitive Guide to Overcoming Procrastination, Perfectionism, and Writer's Block by Hillary Rettig (Thanks to author Maria E. Andreu for recommending this one.)