Although it is not required, you should register your vehicle and determine your parking situation.
Learn about financial aid to receive scholarships, loans, employment opportunities, etc.
If you don't have a place to stay yet, here is a link to some housing resources
Participate in orientation to meet other new students. By attending, you will also receive a lot of information and be able to receive answers to your questions, in person. (note: a fee is required to attend)