Time

I spent so much time to surf into the net. Looks like I'm addicted to it. I don't know what should I do to control myself. After I woke up, I go to check mails & before I go to bed I do the same. Sometimes I spend 2-3 hrs to surf the net without taking a break. And some days are worst than that. I spent like 4-6 hrs. Plz help me guys; suggest me how to control myself. This kinda addiction is harder than any other behaviour.