Write down your locker number on the inside of your pencil case in case you forget where it is the first little while. A thousand lockers in a big school all look the same. Talk to people. Make new friends. Explore the clubs, teams and other activities.
High school offers lots of cool stuff to do and get involved with.
It's a great way to get to know people, too. Make sure you keep all the papers your teachers give you. Many teachers at high school will want you to pay extra fees or purchase special supplies for their classes. Go through your binder at night and make sure you let your parents know what's coming up, what needs to be bought and by when. Keep a daily planner.