" If e-mail were to move to the periphery of your workday, you’d be required to deploy a more thoughtful approach to figuring out what you should be working on and for how long. This type of planning is hard. Consider, for example, David Allen’s Getting Things Done task-management methodology, which is a well-respected system for intelligently managing competing workplace obligations. "

― Cal Newport , Deep Work: Rules for Focused Success in a Distracted World