This is one I'm really missing here. It's very simple: everyone posts a (fictional) sentence that connects to the sentence before and so a story will be formed. If someone accidentally posts two sentences then we won't make a fuss about it but please spare us endless posts that almost contain a story in themselves. So the first line will be:
As he was sipping his tea on the balcony, Steve realised with a shock he only had two minutes left to vote for the new municipal council.