Several times lately, while forced to wait for something, even for a short time, I have caught myself picking up my cell phone and aimlessly flipping through email or turning to a game. I’m not talking about long waits, the kind you might have at an airport between arrival and boarding. Nor am I talking about time spent, say, in a doctor’s waiting room or getting your car’s oil changed. On those occasions, having a good book to read or a game to play is a good thing—especiall