Passport. You will need a valid passport for the travelling entailed by your study abroad. If you do not yet have a passport, get going on this right now. If you do hold a passport, check the expiration date to make sure it covers your period abroad and more (check with appropriate consulate). If you will need to renew your passport, get going on this right now. Information on how to get and renew passports is available in the Office for Foreign Study.
International Student ID Card. This card is one of the few truly good deals that will be available to you during your entire life. It provides supplemental health insurance, as well as cheapies and even freebies for all sort of things you will want to do while you are abroad, e.g., travel, museums, concerts, theater, opera, all sorts of public places and events. You should not leave this country without it. The card can be purchased in the Office for Foreign Study.