Good luck to everyone on their midterms! Study hard.
TIP: For peak cognitive performance, get 7-8 hours of sleep before an exam, with at least 1 hour before midnight (2 or 3 hours are better) if at all possible. Insufficient sleep can cause you to feel drowsy and have poor concentration. A University of Minnesota study showed that students with more sleep on school nights felt more energetic, received higher grades, and experienced fewer depressive feelings and behaviours when compared to their more sleep-deprived peers.