I can't work. I need to work. But I'm here and on dozens of other sites.
I read Paul Graham's essay about "Disconnecting Distractions" and this is actually something I tried before - using my other laptop only for Internet access and this one only for work.
But then I fell back to using my work computer to access the internet - there's always an excuse to hit FN+F2 to reconnect my WiFi access - and so easy!
How can I make it so painfully difficult to get back online on my work computer each time that I just won't want to bother except in an emergency.
(I use a wifi router for all of my internet access - it's in the other room but I share it with others so I can't just disconnect it).