So as an art student, my sketchbook is my home.
I draw in it ALL the time.
If you want to be an art student, get a sketchbook and DRAW. ALL the time. Serious.
Anyways, my sketchbook varies in being observational and a place for me to create ideas for characters. I started traditional animation in my second semester of freshman year and I love it. Goal for summer, create more and better animations.