Mark Pilgrim is practically productive. He can't avoid the internet entirely while writing, because Google is his research tool. So he uses just one browser in incognito/privacy mode to avoid Twitter, email, and other timesinks. Google Chrome's Incognito mode—easy enough to create a direct launching shortcut to —and Firefox with Stealther installed (or the built-in Privacy Mode, coming in the 3.5 upgrade) prevent your easily-distracted id from logging in automatically to all the sites you can easily kill time on. Of course, the truly determined procrastinator could just thoughtlessly smack out their credentials. So we'd recommend creating a new profile in Firefox for when you really want to work, launching it for your necessary research, and filling it with fake and lightly abusive password/user combinations that add another mental barrier. Maybe seeing youcan'taffordthis as a NewEgg username, or having SumbleUpon remind you that getbacktowork/youslacker is an invalid username/password combination, is just the contextual kick in the pants you need.