Each week Ad Hoc Fiction - run by Bath Flash Fiction Award - posts a prompt word. They throw down the challenge to write a 150 word story that includes the prompt in some way.
For 21 consecutive weeks I have taken the challenge and now have quite the collection. You can read the e-book for free for 7 days - then at midnight UK time on a Tuesday it disappears and the next week's book is posted along with a new prompt.
It's all good stuff and really good for 'those little grey cells'. It is also loads of fun. If ever you need to know which page my story is on - give me a holler and then you can vote for it if you like it. Find this week's issue here - I am on page 12. The title: Choice.