The Pomodoro technique
Turn off, log out of, or otherwise disable anything that might break your concentration. Close your email, Twitter client, and anything that might pop up a notification. Turn off your cell and close your office door. It’s okay - you won’t be gone that long, and the world will still be there when you get back.
Grab a timer and set it for 25 minutes.
Focus on your work for that 25 minutes, not letting anything interrupt you. Whatever it is, it can wait.
When the timer goes off, stop right there. Drop your pencil, take your hands off the keyboard, or whatever.
Take a break - at least 5 minutes.
