Step 1: Toss hair up in messy bun or ponytail. Optional: put pencil in bun.
Step 2: Throw on a pair of comfy pants. Since leggings are not pants, leggings are out of the question. Plus, you don't want to end up looking like every other female undergrad.
Step 3: Pick your favorite button up shirt. And then roll up the sleeves. Nothing shows that you mean business like rolled up sleeves.
Step 4: Add a scarf. Rolled up sleeves show that you're serious, but it can also put you at risk of getting cold. A scarf can help keep you warm, and at the very least, add some interest to the outfit.
Step 5: Put on fun flats or sandals. Skip the sneakers. We're going for library-chic here.
Chambray: Old Navy | exact
Scarf: H&M | exact (now only $7!)
Exact Stretch Pants: The Limited | exact