For the ones who require some extra motivation to remain disciplined, you can use a tool like SelfControl (http://selfcontrolapp.com/) to keep you away from casual browsing.
Also, FWIW, I find Pomodoro's time slicing technique pretty productive (there are many apps that support it - I'm using PomodoroApp on Mac (https://itunes.apple.com/us/app/pomodoroapp/id705103149?mt=1...). I usually go with 25min + 5min cycles. (If only all meetings fit in that 25 mins I'd be the happiest man on Earth).
Also, FWIW, I find Pomodoro's time slicing technique pretty productive (there are many apps that support it - I'm using PomodoroApp on Mac (https://itunes.apple.com/us/app/pomodoroapp/id705103149?mt=1...). I usually go with 25min + 5min cycles. (If only all meetings fit in that 25 mins I'd be the happiest man on Earth).