“You could fill any arbitrary number of hours with what feels to be productive work. Between e-mail, and crucial web surfing, and to-do lists that, in the age of David Allen, grow to lengths that rival the bible, there is always something you could be doing. At some point, however, you have to put a stake in the ground and say: I know I have a never-ending stream of work, but this is when I’m going to face it. If you don’t, you’ll let this work push you around like a bully. It will force you into tiring, inefficient schedules, and you’ll end up more stressed and no more accomplished.
Fix the schedule you want. Then make everything else fit around your needs. Be flexible. Be efficient. If you can’t make it fit: change your work. But in the end, don’t compromise”