1) Close windows and shutters by day
2) Open windows and shutters by night
This is because at night the temperature can fall by as much as 3 degrees - the difference between a fiercely-boiled brain and a slow-simmered brain, though it does allow free access for the nocturnal blood-sucking mosquitos.
3) Spray water on your face from a Conn Trombone Slide Water Spray Bottle
4) Wear a knotted handkerchief on your head and roll up your trousers
5) Drink lots and lots