Roy Peter Clark was a famous writing coach when newspapers started directing their reporters to tell the news through a story-telling format in the late 70s and 80s, a genre called New Journalism and made famous by Tom Wolfe.
(The main difference between New Journalism stories and your college essays is that your stories are told in the first person, as opposed to the third person. It’s all narrative writing.)
Here’s a link to his 50 tips, and podcasts: http://www.poynter.org/column.asp?id=78&aid=103943
My favorite tips, when it comes to writing college essays, are numbers 1, 8, 9, 10, 14, 20, 21, 22, 24, 32 and 34.
(With each podcast, Clark elaborates on the tip with examples and further insights–if you have the patience and are a good listener. I’m getting the book!)