1. Treat your password like your toothbrush – keep it to yourself!
2. Only give your mobile number or personal website address to trusted friends.
3. Block the bully – learn to block or report someone who is behaving badly.
4. Save the evidence – learn how to keep records of offending text messages, pictures or online conversations.
5. Don’t retaliate or reply.
6. Check your profile and make sure it doesn’t include any personal information.
7. Always respect others – be careful what you say online and what images you send.
8. Think before you send – whatever you send can be made public very quickly and could stay online forever.
9. Look out for your friends – and do something if you think they are at risk.
10. Tell your parent, carer or a teacher if something or someone makes you feel uncomfortable or worried.
The "ThinkuKnow" website is brought to you by the Child Exploitation and Online Protections (CEOP) centre. You may have seen some of their video clips on National TV recently. There's a lot of information here for both children and adults - parents even have their own area of the site!
Kidsmart gives you lots of advice on how to stay safe online. There's a section for children under 11 years old and a separate section for those over 11 years old.
4 great games will test your online safety knowledge.