I share the opinion of going cold turkey. Ive been there myself and in my case didnt bring any side effects. The only side effects were that I actually started having time for other stuff that interests me. Imbalance, try to use the computer as a tool, dont let it make you a tool
If you dont want to give up completely use an alarm clock and set it at one hour. When the hour is over switch off the computer. That way
you are in control and not the dumb machine.
Good luck buddy