Is email snuffing out your productivity? Facebook? Twitter? You might consider this Mac application called SelfControl that blocks access to all three accounts (or just one) for a predetermined block of time of time. You can still surf the web though, since you might need that for some actual research. Most importantly, once you run the program, you can’t stop it – even by restarting your computer or deleting the application!
Hat tip: Magdalena Kala
Addendum: A new year’s resolution featuring SelfControl.