Something in college drinking water makes you hungry all the time, so make sure that you have enough money to buy snacks to have around. If you are planning on hitting frat parties in college, prepare to spend some money. If you have a car, the fact that you will need gas money is obvious. However, if you don't have a car but are driven around by a friend, it is a good idea to give them a few bucks every now and then, just to let them know that you appreciate them chauffeuring you around. Also, gas money will be absolutely necessary if you and your buds decide to go on a spontaneous road trip sometime during the year.
College students are at great risk of forgetting about the outside world once school starts.
The trees on your college campus won't have any more money growing on them than your trees at home.