Life is too short not to try. Give more than you take.
Observe others. Watch what they are like, what their body language, their clothes, the friends they have, the way they speak tells you about them. And then don't come to any conclusion about them. Keep an open mind, because no matter how much you think you know about those others you were observing, you don't even know half the story.
Smile more often. Enjoy the world around you, because if you can leave your home without fear, you are more blessed than those others who cannot have that luxury.
Listen when others speak to you; stop focusing about yourself, worrying about how they perceive you. Be a friend to them and make their day better with whatever time you spend with them.
Look at your fears as a challenge--an area in which you can improve. Look them in the face and see them for what they are. Overcome, then leave them behind in the dust. Don't look back.
When you look at your face in the mirror, don't agonize over the blemishes, the big nose, the frizzy hair, or the eyebrows that you never get right. You are beautiful. Stop criticizing yourself every time you see your reflection. There is no other person like you in the world, and there never will be after you.
Keep your head up. Stand up straight. Walk with purpose.