conversations, I sent exactly five e-mails after five thirty p.m. The immediate story told by these statistics is that, with few exceptions, I don’t send e-mails after five thirty. But given how intertwined e-mail has become with work in general, there’s a more surprising reality hinted by this behavior: I don’t work after five thirty p.m. I call this commitment fixed-schedule productivity, as I fix the firm goal of not working past a certain time, then work backward to find productivity strategies that allow me to satisfy this declaration. I’ve practiced fixed-schedule productivity

