Being a better person
Try to help others
Be better in school
Be kinder to your family
If you see someone who needs help, help them. Stop bullies, and make friends with the new kid. Anything that will make another person feel better or be happy, you should try to do ( within reason).
Being better in school is all in your head - literally! You have to make an effort to do your homework, get along with your peers, and be respectful to your teachers. And remember, if you think you can- you can!
Just try to get along with your siblings, and try to have empithy for the things they do, remember when you were a kid, you may have been just like them.