Get off MSN.
Close down Skype.
Close that Facebook tab.
Switch your phone off, or at least put it on silent.
Leave your RSS reader unread (or, even better, mark all as read).
Don't go clean the kitchen.
Don't start tidying your desk.
Don't google anything.
Just... WRITE YOUR DAMN BLOG POST!
[says the person who constantly does all of the above. No wonder I don't have time to actually write for or promote my blogs properly!]