When working with research assistants, I often have to work hard to convince them that they must schedule in "percolation time" every single day. That is, time away from reading, away from data analysis, and away from all technology... to sit and think about their research. Just think about it. Let it breathe.
Or even better, I urge them to work their tails off in the morning, then have a NON-working lunch, then, take a nap. When they do, they begin to realize that when they wake up they suddenly have new insights and a deeper understanding of the stuff they did that morning.