Are U optimistic or pessimisit?
Use positive affirmations. Write down short statements that remind you of what you're trying to change about the way you see the world. Put them in places where you'll see them every day, such as on your bathroom mirror, the inside of your locker, on your computer monitor, and even taped to your shower wall.
Use quotes to remind yourself how to be optimistic. Maybe if during a particularly tough day someone mentions some saying that gives you a rare boost of motivation, write it down.