From the 3rd Annual Flash Fiction Challenge 2010:
In each challenge, writers have 2 days to complete a 1,000 word story based on an assigned genre, location, and object.
There are three rounds to compete in, narrowing down the writers, until the fourth round when there are just 25 left in the competition. The official early entry deadline is July 8th, 2010. There are prizes for winners but, there is an entry fee to start. So, why not take the challenge unofficially?
Every 2 days pick a writing genre (western, fantasy, etc.) then a location and an object (how about your living room and an empty can of diet Coke), for instance). See if you can keep to the schedule and come up with a 1,000 word short story.