This is what I wore to go to uni for a couple minutes to hand in an assignment in the early morning. I've really embraced the casual look -- jeans and oversized cardigans are my uniform lately. As long as my hair is decent and I've got a swipe of lipstick on, it's not much effort at all to avoid looking too hobo-y.

American Apparel cardigan
Arizona shirt
Topshop pants & shoes