Whenever I try to get some school work done on my MacBook I always seem to get distracted from my task. It just so happens that my favorite web browser (currently Firefox 3 Beta 5) is usually the source of my distraction.

Enter Freedom. A simple little app that conquers a very big problem. Freedom disables your Mac's AirPort and Ethernet for any amount of time between 1 minute to 3 hours. And just to be sure you aren't tempted to quit Freedom to get back your 'internets,' the only way to disable it before it's time is up is to reboot your Mac (or have some Terminal skills).

Needless to say, Freedom can really boost your productivity.