Anger is natural when needs aren't met. Listen to your heart and take care of your needs. If anger is present, don't suppress it. Express it in a way that doesn't hurt anybody and then let it go. Be nonviolent and calm.
Violence begets violence.
Abstain from alcohol and immoderate behavior. When we are kind to others, Nature is kind to us. Be respectful to teachers and elders. All human behavior is learned and humans are social animals. The flow of knowledge from generation to generation takes place more smoothly in an atmosphere of respect.