Plenty of successful people practice the Pomodoro technique for time management. Many purchase a simple timer to stay on track. You can always build your own. Particle Pomodoro is an internet-connected Pomodoro timer that logs your cycles to Google sheets.
The device is easy to use. Just press the button (2,3,4) to start the timer and press the button 1 to reset it. The device can also play a melody when it is rest time. You are going to need a Particle Internet button to get started.