I highly recommend the LeechBlock add-on for Firefox (https://addons.mozilla.org/en-US/firefox/addon/4476 https://addons.mozilla.org/en-US/firefox/addon/4476).

I highly recommend the LeechBlock add-on for Firefox (https://addons.mozilla.org/en-US/firefox/addon/4476 https://addons.mozilla.org/en-US/firefox/addon/4476). You can tell it to only let you read X minutes of HN (or any other site) in a day, and then it will block you. This add-on has really helped me get through my current project. In fact I had better finish typing this quickly before my HN/Slashdot/gmail limit runs out.