Hello!
The time run away , and end-of-term examinations is comming. I want to advise you what you can do to learn better.
1)Prepare all materials.
2)Prepare a detailed plan of learning
3)Ventilate the room. And then ventilate it again every hour. Fresh air is the best student`s firend.
4)Take care of a very good room lighting
5)Plan the break
6)Do not do before learning anything that might trigger strong emotions
7)[Optional] Select the appropriate music. Top reproducible, without words or in a foreign language, predictable and stimulating

I hope this post will be useful:)  Bye!