Everyone used to comment on how relaxed I was going into an examination, that's how I did it. That and I accepted there was nothing else I could do at this point but that's a personality trait I can't pass on:P. Cramming all night does nothing but wear you out. Exhaustion causes you to make stupid mistakes. Additionally exhaustion causes your recall mechanism to not function properly that and of course for data to be absorbed by the brain you need rest.
You should always eat well.
Biology and its processes are natural and automatic so give in to its needs as its your instinct to stay alive.
Acquiring refined scientific knowledge is an artificial construct so it will always take a back seat to your automatic processes this is basic survival instinct. In short if your hungry you won't be thinking of much else than acquiring food. Comically it's the same reason you shouldn't grocery shop on an empty stomach.
Why is acquiring refined knowledge artificial? you won't die from not knowing that the neuron myelin sheath is segmented but you'll die from not eating.
Thank you! I struggle to remain relaxed before exams, but maybe I can try harder to suppress that.
And I'll ensure I'm getting all the food and drink that I need to stay alive and well :P