How To Study In High School?

[Anirban657]

I am an above average student but the end of my high school years is coming closer, I feel stress and anxious about my performance. So consequently my grades are decreasing and I feel demotivated to study.

To have the patience to sit down for hours and study is a difficult task for me. I don't know if studying for long periods affects my grades but I feel that I am not able to focus on the information. 

I really want some help. 

Edited April 16, 2017 by Anirban657

[Evilwave Heddy]

Try getting up super early.  I found getting up early made it easier to set my mind on studying and then by 12 midday I wouldn't be able to anything.