I have finished one year at university, so these suggestions are from experience:
Your laptop is your most important possession while in college. At my school, all my work is assigned and submitted online, and 90% of it is done entirely on the computer.
I would strongly advise against wireless keyboards and mice. I have the Apple wireless keyboard and magic mouse, and they EAT BATTERIES. Partly because sometimes stuff gets put on top of them accidentally, but it's just generally not a good idea. Plus, they could "disappear" pretty easily. Get a silicon keyboard cover for your laptop to prevent crumbs and liquids from getting in there. Personally, I cannot type with a cover on the keyboard, but if you can then it is a very good investment.
You will be doing very little work at your desk. Depending on your major, you could not do any work at your desk. The only reason I work at my desk is because I am majoring in Computer Science, and when we have large programming projects we often have lots of windows open at once.
Speaking of Windows.... download
VirtualBox and buy Windows from your university. Check with the bookstore, and your individual academic department for the best pricing. My university does not offer a discount on any software, but the school of engineering offers all Microsoft software for free. You will probably have that one class that has a piece of software from 1992 that only runs on Windows (if you are taking statistics, you will use MiniTab, which is Windows only. If you take digital circuits, you will use LogicWorks which is Windows only, etc).
Get a wireless router if your school allows. The university's WiFi is pathetic, so it is a necessity here. If you get your own router, you should also get a network printer so you can print from a few rooms down if you are working on an assignment with a friend or something.
Get 2 extra MagSafe adapters - that way you have 1 for your room, 1 for your backpack, and 1 at home. Trust me... you don't always think about power adapters.
Pass on the dock. It's just easier to get knocked over. And like I said... you will not be working at your desk.
Get 2.0 speakers, or if they are 2.1 they must have a bass adjustment knob. If you want to listen to music (or you are having a mini-party in your room), chances are your RA/CA/DA/whatever will not appreciate the bass at midnight if they have an exam at 8am the next morning. Headphones - get something that is noise canceling but not too expensive.
Also, here's a few general tips: Always lock your door if no one is in your room, lock your laptop to your desk until you trust your roommate, and get a good backpack that has a laptop sleeve in it but doesn't specifically scream "There is a $1800 laptop in here".
Finally, remember - roommates pee on things. So put everything away when you're not using it.