I have seen a few interesting things online recently about online media. First was an article in the Washington Post about the problem of gaming addiction in kids, a problem estimated to occur in 5% of teens. The article discusses one family's struggle and talks about available resources. The best way to help kids with gaming is to help them learn to set limits. Keep screens (computers, TVs, game systems) out of bedrooms and in public areas of the house, so kids can be supervised while they play. Establish time limits in advance and keep them. Set a timer if you need one. Be firm. Be consistent. Your child might not like it, but you are helping them learn self-regulation.
The second thing is the video below. The focus of the discussion is Millenials in the workplace, but there is a lot of discussion and good information about social media, texting, and online presence that is relevant to tweens and teens. Take a look. We as parents also need to be aware of our own cell phone and media use. Make meals cell phone free zones. Check out the tips in the video and see if you can make them work in your household.