Well, We don't have any TV service (except for netflix, which the kids only watch once or twice a week), and for video games/computer games they ALWAYS must be earned- EVEN in the summer time with no school. I have a reward system whenever I think that they have deserved a "point" (a voluntary chore, being especially kind to a sister, helping me out, just a good attitude about something, self-improvement on personal issues, etc), I give them one. A point can be taken away if someone is rude or naughty. Right now, I have at 5 points, they earn 30 min. of a video game (and that is the most they end up ever playing in a day- I'll be honest, they certainly don't play everyday, they are frequently NOT reaching 5 points). There are also other rewards such as a "treasure box" that can be accessed through earning 9 points. Points start fresh every day, you start at zero.
Video games are a reward. But, my oldest is on restriction from video games for another 3 weeks due to letting the game get the best of her and having a fit over the fact that she wasn't doing as well as she wanted. I told her that it is supposed to be fun, and that games should not be something that cause anger. We are working on her coping skills and I'm helping her put into perspective what is REALLY important.
We use Netflix for times M. HAS to shower and it helps them sorta stay put while that occurs (but I mostly shower when they are sound-asleep) and we also use it for our almost weekly family movie night.
During the school year, video game and TV usage is even less, just cause it ends up being that way. There is scouts, homework, ballet or gymnastics, and then there's dinner and a shower- there is hardly ANY time for video games or TV during the school week! The kids are fine with it- they actually value reading a book, going outside, coloring, or playing a board game over electronic stuff for the most part (they DO enjoy the video game reward, though!).
OH, their ages are 4, 5, 7 and 9. Kindergarten, 2nd grade and 4th grade... the youngest will be at home with me.