In break time call your close one, can be a friend or a family member who you are close to. This will refresh your mind.
Take a power nap in between your study break, one of the most effective things done by the students.
Avoid multitasking things in a hurry so that you will not be able to do the work you are even capable of.
The place where you are studying also matters a lot. A change in the environment distracts the focus of the mind.
Listen to soothing or relaxing songs during your study break do your favorite activity or go out for a walk in fresh air.
Always keep yourself hydrated and eat something in the break time which will increase the energy level and help in focusing.
In your study break try to mediate, give some relaxation to the mind, or get involved in some relaxing activities.