"passive" air conditioning.
In "Mother Earth" magazine, I once read an article about cooling your home without using electricity. Basically, it consists of closing all doors and windows except for the ones in the attic and basement. Since hot air rises and vents out of the attic, it pulls in cooler air from below thus keeping temperatures lower inside than out.
My home in DR is two-level so that when the chimney-like vent over the stove is open, it acts the same way thus keeping it cooler.
Marble flooring also helps since it dissipates heat very effectively. Also trees and awnings around the house can keep you cooler without resulting to drastic measures, i.e., bathing in a tub of ice.