Create a Study Plan to Prevent Internet Addiction
Disconnect the Internet
Get a hobby or an interest that doesn't involve the internet

Parents should always be aware of their teenager's internet activity. They can limit their internet usage by taking away their electronic devices at certain times.
Parents and teachers could advice and explain the dangers and effects of excessive internet usage to teenagers.

Hope that helps :)
Can you give me some examples to help teenagers to prevent too much using the Internet while already addicted to it.