NATIONAL NOVEL WRITING MONTH
Nov. 1st - Nov. 30th
Write 50 000 words within a month.
Novels, collection of short stories, scripts.
Happens once a year.
I did this in Grade 10, and finished my novel Equilibrium (the predecessor of Obsolete) for NaNoWriMo.
Here's the link if you're interested in the details:
http://www.nanowrimo.org/Even if you don't want to do the contest, the site itself is pretty useful.