You could try - K9 Web protection But I am still battling this myself - discipline is what it takes. I'm travelling this weekend for work and stuck in a hotel

You could try - K9 Web protection But I am still battling this myself - discipline is what it takes. I'm travelling this weekend for work and stuck in a hotel with rate capped internet (0.5mbit). It's so slow for browsing it's unbelievable. Yesterday I managed around 16 hours of work because I just got so fed up with the internet speed that I gave up browsing. So you could try that - download all the docs you need, get all the development tools setup on your local machine and then just go somewhere with no internet.