If you are addicted to the internet you should do some soul searching. Where are your friends? What are your other interests? What are your hobbies? Why have you chosen technology instead of human socialization or physical activities?
Addiction is a problem no matter what the subject of the addiction. Moderation is key in all elements of life and in all activities. If you are obsessed with only one activity or area then there is a huge problem and you need to seek help before it takes over your life and causes consequences. I am not only speaking about surfing into rough waters and websites that are not kosher and should be avoided. Newbies to the internet who are usually the ones addicted have no concept of time and “forget” to sleep, miss appointments, forget to leave their computers to eat and do normal basic everyday rituals. This is nothing to laugh about. A person cannot function properly neither at school nor work, nor taking care of the home or family without the proper rest and nutrition their body requires. So right off the bat there are those consequences.
To take it a step further, if you go into websites you shouldn’t such as gambling or worse, you will wind up spending enormous amounts of money that you can’t afford to lose. That is true for shopping clubs and the like. If you take that a step further and go into worse websites you are bordering on Sholom Bayis issues that will be hard to rectify.
The internet is a tool to be used wisely and in moderation. If you do not know how to control yourself I would suggest you take your computer and give it away until you can figure out what is going on with you.