My pet peeve in college was people who "studied" for "12 hours yesterday" but never had more than 12 minutes of continuous focus.
Personally I have the most success with a couple of hours of focus followed by 30-120 minutes of doing anything else (walking, billiards, lunch, netflix, whatever)
Personally I have the most success with a couple of hours of focus followed by 30-120 minutes of doing anything else (walking, billiards, lunch, netflix, whatever)