Get some stackable folder organizers for at home, so you can have somewhere to put your papers and folders for school! I also recommend getting a special storage area for your clinical things like your stethoscope, watch, name badge, etc. I have a small Rubbermaid thing that has 3 drawers and I keep all my clinical equipment in there so I don't lose it.
Aside from that, you'll want the obvious things: notebooks, binders, paper, folders, pens, highlighters, index cards, and bigger notecards for when you get into pharmacology. Trust me on this, the big ones are a godsend. Also, maybe some rings to put the cards on. And a ROLLING BAG, not a backpack. You're going to have so damn many books, please save your back and get a bag that rolls with a handle. I use a luggage case for mine!
Some other helpful things might include a planner, a stock supply of healthy snacks and water, and some compression socks for when you start clinicals - they'll help your feet to not feel like they're dying.
Congratulations and good luck! :)