Either i will do something random like "A pair of vampyres was chasing 17 year old Wyatt Thomas. (Again) OR i may do something more blunt like "This is a story; my story" but I've been wanting to start a new one out like someone is reading from a story book
It really depends on whose voice I plan on telling the story in. I like to make a prologue that is somewhere in the story as a precursor to the future or the past, and it's usually something that will come up again later. I don't always start with a prologue, but sometimes the problem needing to be resolved and the elements that will play a part in resolving it all.
Most of the time I start with a character looking back on the events that brought her/him to where they are now. It's always where said character is near certain death.