Here is an excellent challenge if you like writing Flash Fiction, or an opportunity to experiment if the genre is new to you. Helen Yendall is running a Random Words competition here and offering two sets of prizes. I really like it that she's running a New Writer category for writers who haven't yet been published (full terms on her Blog), which is good to see as it's tough to get placed when you're starting out when so many more experienced (and professional) writers are regularly entering competitions.
All you have to do is pen a 250 word story, which must contain these 4 words (chosen at random by Helen):
reluctant, plague, magazine, sleep
So take a look at the prize on offer and the terms of the competition over at Helen's Blog about writing.