vodka, gin, tequila, rum if ya like it sweet.
oh, right. sorry. I thought about this, too. honestly, outside of your laptop I wouldn't buy a whole lot outside of hanging file folders if you're planning on using a filing system of any sort, some writing pads (notebooks can be a pain to smoosh into an otherwise full bookbag, but legal pads fit quite nice), your favorite pens (i'm neurotic and will only use one kind of pen), highlighters, maybe some of those colored post it page markers to mark your case books for quick reference (these things are great, get some if you've never used them). Outside of that I wouldn't sweat it--leave maybe a small portion of your supplies budget for things you won't know you need until you develop your study patterns and then you can get it then