Everything I could tell you about your application, I've written in the post. :)

The only other than I'd add is to write less. Get to the point. Clear language is indicative of clear thinking (something I'm still learning myself).

It's easy to slide into formal writing because that's what we're all use to in college, but it'll kill you here. Use short easy words. Use simple sentences. Cut out words that don't get to the point. You don't have to explain everything. Just explain the crux and the core.

I know, easier said than done. I'm a bit sheepish that my post was so long, but I cut as much as I could in the time that I had.

"I would have written a shorter letter, but I did not have the time." - Pascal

Most of the time you spend writing your YC application should be on making it clearer and removing unnecessary words.