Monitor and limit
This topic can be one that will cause some problems. Your kids can see this as an invasion of their privacy (give me a break) the fact is you set the rules and you enforce them.
Monitor what your children are doing online there should be no secrets if there are chances are there is a problem. This is where a good filter and monitoring software can come in handy. They will have features that allow you to see sites that were accessed and sites that were blocked (that is if you have an Internet filter) remember you are there protector. We know today’s teens think they know ever thing and don’t need any advice, but to the contrary they are weak and vulnerable.
Limit the time you allow your kids to be on the Internet. Decide the times and the days and stick to it. Spending too much play time on the Internet can be very dangerous.