Use a timer!

This calendar management hack is super easy, and only costs about $5. Use a timer while you work. A timer that ticks. That’s it and it works.

Weird? Not really, just think about it for a second. You’re at your desk trying to wrap up a seemingly never ending task and, if you’ve been paying attention to turning off your notifications and scheduling your response times then you are interruption free but that doesn’t make the busy work easier to get through. Do this, simply plan for how long a task will take you, set the timer, and begin! Subconsciously your brain will race against the clock (hence the ticking requirement). Not only are you now interruption free, but you are tricking your brain into finishing tasks faster and more efficiently.

I use a kitchen egg timer. Works like a gem.