Until _____, nothing had ever happened in the village of Fool's Knock.
Set a timer for 10-15 minutes, fill in the blank and keep writing.
You won't have a complete story by the end of the time, just a beginning, perhaps just a paragraph. The purpose is to get stuff flowing out under pressure. Don't worry about grammar or spelling or even if things make sense! It's going to be raw.
If at the end of the timer you're on a roll, by all means keep going!
Often the biggest roadblock to writing is ourselves. We edit too much. We reject ideas before we even give them a chance. The timer will force you to write over that voice that says "Nah, that's no good," or "That's boring."
You
will write a lot of junk. Expect that. Maybe even require it of yourself. If you expect it to be bad then the gems that pop up will be like treasures. Again don't worry that it's not a finished product. Don't worry about grammar and spelling.