Get unblocked and write the thing
The fabulous personal productivity blog 43 Folders gives some sweet and effective insta-cures for when you're staring at a blank screen while deadlines loom.
Among the tidbits in the entry Hack your way out of writer's block:
Write crap - Accept that your first draft will suck, and just go with it. Finish something.
Unplug the router - Metafilter and Boing Boing aren't helping you right now. Turn off the Interweb and close every application you don't need. Consider creating a new user account on your computer with none of your familiar apps or configurations.
Write the middle - Stop whining over a perfect lead, and write the next part or the part after that. Write your favorite part. Write the cover letter or email you'll send when it's done.
Write five words - Literally. Put five completley random words on a piece of paper. Write five more words. Try a sentence. Could be about anything. A block ends when you start making words on a page.
Bravo, Merlin Mann -- we especially like the one about the power of lower standards. Crap or not, it's a start.