security4web has a nice list of suggestions to protect your child online (follow the link to read the entire 19-point list):
- Be aware of cyberspace threats! Learn about all risks children may face while surfing on the Internet and start educating them on how to protect themselves online.
- Talk to your children about dangers they can encounter as long as they are online. Do not be reluctant to subjects such as sexuality, pornography or pedophiles. Do not consider them taboo.
- Make sure your children know that not everything they read on the Internet is true and accurate.