Funnily enough, I started doing this last week when I realized that I'm on the Internet instead of learning the things I want to be doing -- martial arts, dancing, woodwork, metalwork, mechanics, hunting, chemistry, making friends, learning to fly, adrenaline rushes, etc. The only difference is that I allow the use of Internet cafes.

You do get physical and psychological withdrawals. I've been having fucking night terrors -- I've only had those once in my life, and that's when I gave up a drug addiction. There's an overwhelming feeling of loneliness and emptiness, but I knew this would happen since I don't have much of a social life.

Everything is slow.

At the moment it's not going well, because it's dawned on me that I can't afford the things I've been missing out on -- can't even afford martial arts classes. I've had no motivation to increase my income since I've just been spending time on the Internet.

However, this is what I've been banking on. The deep emptiness will hopefully motivate me to make a real change, as opposed to the shallow and medicated emptiness I felt thanks to the Internet.

Good luck.