Something Scalzi said at Viable Paradise (paraphrased): "Your first sentence buys you the first paragraph. Your first paragraph buys you the first page. Your first page buys you the first chapter. Your first chapter buys the next one."
In that spirit, here's a collection of first lines from college application essays--specifically, Stanford's class of 2012. Some of these could be (and some probably are) hooks for really interesting stories. My personal favorite is "I have old hands."