Buy a communal toothbrush for cleaning the grout between the tiles in the bathroom. You can get away with doing it once a week.
Rice, potatos, frozen vegetables and condiments can go a LONG way. Remember this.
In your first week, don't try too hard to get noticed. Nobody likes an attention grabber. Conversely, for your first week or two, dress nicely, but casually. First impressions are lasting ones. At the very least, you want your first impression on people to be that you know how to dress yourself. Try getting a nice haircut a week or two in advance.
Classes are VERY important, as is striking up a familiarity with your tutors. You're better off if your teachers like you. If they don't know who you are, it could bite you on the ass one day. Show up after class one day with an intelligent question and maybe an interesting hat or piece of jewellery. If they ask about it, even better, because then you can tell them an interesting story about how you acquired it and they're sure to remember the student who inherited a fedora from an illegal immigrant who was shot crossing the border. This technique also works well for job interviews. It'll make you stand out from the crowd, which is something you desire when it comes to authority figures.
Finally, the best and most important advice...
Budget. Sounds obvious, but so few people do it. Write a plan, plot allowances, stick to them. Time is money, so having a time table on a noticeboard might be a good idea. College is where you learn to stop procrastinating. When something shows up, get it out of the way as fast as possible. Put it on your time table at the earliest date you can. Get it out of the way. Time is the only thing you have, and you need to start acting like free time it the most important thing in the world. Work on having as much free time as you can in case anything else ever shows up.