I’m a big fan of allowing myself a given time box, say 20 minutes, to send an email or make progress on a project (like writing this article)
Working remotely & Getting things done
Rodolphe Dutel

I agree with you on Timeboxing. Last week I did an experiment using Pomodoro and the Productivity Planner and found it to be helpful for my efficiency: https://medium.com/@lcdvirgo/my-mini-experiment-on-hacking-productivity-11f4f655f930#.osltolb77