Ask HN: How do you switch between activities?

I would like to read or study between work hours. However if I work 4 hrs in the morning, I find it difficult to study 1hr in the afternoon. At this point I just want to take break. By the time I am relaxed and ready to study, 1hr is already passed.

Has anyone experimented with any tricks to help you switch between these kinds of tasks quickly.

I want to work 4hr in the morning, take 5 min break and study 2hr in the afternoon and then work another 4 hr in the evening.