Sleep is necessary!
Be sure to solve each previous year question paper in timing of 10am–1pm on a daily basis.
It will set your biological clock,and your brain would be more active in those 3 hrs.
Do not worry if you’re not able to solve the questions,just know the basic concepts!
Solve a large no. of questions of different subject simultaneously . It will increase your no. of clicks during exam.
All the best!