Wear few, or no clothes.
Drink cold drinks.
Take cold showers.
Soak feet, hands in cold water.
Keep all the doors (internal, I mean) open.
Open windows.
Using air con only adds to global warming.
I tend to soak 2 towels in cold water and wrap them around my torso and legs, respectively. Repeat every few hours. In REALLY hot weather, frequently take very short showers with your clothes on.
Luckily the place I'm living at has a basement, which stays cool even in summer, so those methods aren't necessary.
