There are all kinds of productivity tools out there promising to help you make the most of your day. Some people swear by timeboxing: the method of reserving time on your calendar each day for each task you want to get done, and then truly focusing on that one thing at a time. The return on merging your to-do list with your calendar like this, says Marc Zao-Sanders, is higher productivity, better collaboration, and less distraction and anxiety. He explains how try to the method yourself and the how your team and organization benefit from it, not just you. Zao-Sanders is author of the book "Timeboxing: The Power of Doing One Thing at a Time."