My recipe for efficient writing:

- Put laptop in backpack

- Go someplace where you can be "lonely in a crowd" (e.g. local coffee shop)

- Log out of your Google home page, so all those applets won't claim your attention all the time

- Don't even think of touching anything in the bookmarks

- Keep the email client turned off

- Turn cell phone off too if you must

- Get a nice large latte (either regular or decaf)

- Fire up the text editor

- Let your mind take off

Voila, instant productivity. I get into the "flow" pretty quickly that way.