Games are great, but as others said before, you should have balance at playing them. but it is hard, butI've found a way to make that Balance:

Pack your PC, and put it in your warehouse for 3 months or give your PC monitor or PS3 to a friend...it may be hard (ask your friends or parents) in first but good, and really effective, I had done this previews year before that I spend 6/8 after school time playing video games, but after that I just spend enough time for entertaining and it doesn't damage my life anymore.