Staying focused while working online (or offline) is a challenge. The distractions are too many. If you need something to increase focus while working then Focus Booster might help. It is a nifty timer that allows you to set work and break timings, and alerts you accordingly.
The tool is based on Francesco Cirillo's the Pomodoro technique, a time management method that advocates 25 minutes of work and 5 minutes break cycles for productive output.
This is excellent for your eyes too!
http://www.focusboosterapp.com/