(Question received via comments in the non-consumerist group, where people are sharing how they save electricity by using a clothesline and in some cases doing without AC.)
We don’t stay cool. It’s summer in Florida.
But we stay pretty comfortable with various basics such as window shades, awnings, knowing which rooms are the coolest part of the house at different times of day, etc.
And at some times of the day, outdoors is more comfortable than in.
And, here and there at different times of day, even in summer in FL, it is possible to actually feel cool with the help of a breeze, an outdoor shower or wash-up etc.