Surprisingly, at first i used to feel depressed during such times, but after a while i realized those were good times to sit down or move about and think with pen and paper about some cool ideas.
A lot of my personal projects (I write prose and poetry, and do hobbyist software projects) have been sparked off by reflections or non-tech explorations done away from the computer. Surely, i recommend that every one ought to take some time off tech, especially those whose survival depends on creativity and tech - like developers.
I long quit from Facebook, don't use any social-nets, depending mostly on good old forums, irc and real-time meet-ups. Too much dependence on tech can probably dwarf the intellect in my opinion, nature is still a good source of pure advancement.
Technology is great... in moderation
