NaNoWriMo, or National (International really) Novel Writing Month is coming up in November
The challenge is to write a novel in a month!
'National Novel Writing Month (NaNoWriMo) is a fun, seat-of-your-pants approach to creative writing. On November 1, participants begin working towards the goal of writing a 50,000-word novel by 11:59 p.m. on November 30. Valuing enthusiasm, determination, and a deadline, NaNoWriMo is for anyone who has ever thought fleetingly about writing a novel.'
There is online support as well as local meetings.