El gran secreto de la productividad

As a productivity experiment I worked 90-hour weeks for a month, alternating between working 90 hours one week and then 20 hours the next. I actually found that I got about as much work done in both my 90-hour and 20-hour weeks, for a simple reason: when I limited how much time I spent on a task, I forced myself to exert more energy over less time so I could get the task done in what limited time I had. When I threw more time at my work in my longer weeks, I tended to procrastinate more, work on lower-leverage activities, and waste more time.

10 Lessons I Learned from a Year of Productivity Experiments de Chris Bailey