Be sensible with what you pack. A good rule of thumb is to carry all of your luggage around the block; if you struggle, then you may need to reconsider what you have packed. Packing too much can be very inconvenient and can add a great deal of stress to your travels!
Remember that you will be able to purchase items you need while abroad. While most products will be different from what you are used to, you will learn that this is an important part of your experience. You also may want to consider getting an ISIC card which offers travel insurance and student discounts worldwide.
Looking for more tips? Check out the Padnos International Center's Packing Pinterest Board