The non-essay part of my application asked questions like "What are your hobbies?", "What else occupies your spare time?" or "What publications do you read on a regular basis?"
My advice is not to discount this portion of the application (i.e. fill it in without much thought 20 minutes before submission deadline)
especially if you come from an over-represented demographic. These questions are practically gimmies for you to play the "diversity" card.
Hobbies? Instead of writing "spending time with my family", try "taking my little nieces and nephews to museums and the zoo--I firmly believe learning happens outside the classroom as well."
Spare time? Instead of writing "I watch a lot of documentaries", try "I'm really fascinated by Ancient Roman Culture, so I never miss a TV documentary on it. I also traveled to Italy last summer."
Publications? I think everyone lists the obvious ones like WSJ, The Economist, so throw in some others like Mountain Climbing Monthly, Gourmet Quarterly, or [insert publication/website that you read a lot]
You guys get the idea.