Between my "main" job of being an online facilitator (teacher) of accounting courses and my other "main" job of being a freelance writer, I spend a lot of time on the computer. The majority of the time I spend on the computer is work-related (No, really), but I like to surf for fun just like the next girl.
My kids' online time is limited to Minecraft (I don't understand it, either) and a little bit of T.V. Now that the snow has melted, their zoning-out privileges have been scaled WAY back. They get home from school, have a snack and get a half-hour of screen time, and then they are outside until dinner. They jump on the trampoline, they ride bikes, the swing on our swingset. I don't care what they do, really, as long as they're outside.
I'll be outside, too, unless I have a deadline or I'm cooking dinner, and my husband only comes inside if he absolutely has to. We have an acreage and he loves to putter. Everyone's happier when they're outside in the fresh air and they're also healthier. If it's a cooler day and the kids want to come in, I let them (of course), but they have to read a book or build with LEGO or do something non-screen-related.
Do you have limits on your kids' screen time? Do you make an effort to just get outside?