Stress

Haiz..
PSLE in like 2 weeks time... HELP!!!
I tried banging my head on the wall to make myself smarter cos I heared that it will waken my brain... But I found our that it didn't work cos I am still so stupid so I tried stuffing myself with fish cos i heared that eating fish will make me smarter but after reading a article in the magazine stating that eating will not make you smarter unless you are in your mother's womb and your mother eats a LOT of fish then the baby will be smart but my mom did not eat fish when i was in her womb as she said that the fish stinks of freshness....
Haiz..
Tell me how to make me smarter I will accept any method...