Here are some tips if you or someone you know is being bullied - and advice for ending (or preventing) the cycle of aggression.
Don't respond. If someone bullies you, remember that your reaction is usually exactly what the bully wants. It gives him or her power over you. Who wants to empower a bully?
Don't retaliate. Getting back at the bully turns you into one and reinforces the bully's behavior. Help avoid a whole cycle of aggression.
Talk to a trusted adult. You deserve backup. It's always good to involve a parent but - if you can't - a school counselor usually knows how to help. Sometimes both are needed. If you're really nervous about saying something, see if there's a way to report the incident anonymously at school. Sometimes this can result in bullies getting the help they need to change their behavior.
Save the evidence. The only good news about digital bullying is that the harassing messages can usually be captured, saved, and shown to someone who can help. Save evidence even if it's minor stuff - in case things escalate.