How to study for an exam

Our society is so focused on education and soo much of our self worth depends on marks, that there have actually been tons of studies on the best methods that help us learn things faster.
These studies are mainly carried out to understand our brain and I have heard soo many YouTubers and friends SWEAR by some on these tips.
But do they actually work on someone with two brain cells, out of which one is for sadness and the other for food?
Well, let us find out !!!