I may start sounding like a broken record very soon, but have a read of this article from Wired.
"These are the problems of attention in our new world. Gadgets and technologies give us extraordinary opportunities, the potential to connect and to learn. At the same time, we've created a culture, and are making choices, that undermine our powers of attention.
"Interruptions are correlated with stress, and a cascade of stress hormones accompany that state of being. Stress, frustration and lowered creativity are pretty toxic. And there are studies showing how the environment shapes brain development in kids.