For the love of all things good in the world, block Google Reader.
I disable auto-checking for new email.
Quit Tweetie.
Quit your IRC client.
Listen to some slow, drone-like ambient music (favorite: "The Tired Sounds of Stars of the Lid" or a Buddha Machine).
Also, while in school (when I really had to and wanted to concentrate), I had very good success listening/experiencing binaural beats.
http://en.wikipedia.org/wiki/Binaural_beats
I disable auto-checking for new email.
Quit Tweetie.
Quit your IRC client.
Listen to some slow, drone-like ambient music (favorite: "The Tired Sounds of Stars of the Lid" or a Buddha Machine).
Also, while in school (when I really had to and wanted to concentrate), I had very good success listening/experiencing binaural beats. http://en.wikipedia.org/wiki/Binaural_beats