From my days in the Mexican desert:
If there is any shade around the house, position fans in windows so that it will draw the cool air in and suck the hot air out.
If it's too hot to sleep, wet and wring out a bath sheet or beach towel, cover yourself with it and point the fan on you! This got me through months of 90-100+ degree days when I worked nights.
If your schedule permits, take a nap in the heat of the day and stay up later at night when the air is cooler. My kids and I used to take our naps on the cool cement floors with the fans pulling in the air from under the fig tree.
Michigan tricks or "It's not the heat, it's the humidity":
Use a dehumidifier. Mine has been running non-stop for weeks now and I'm emptying the gallon reservoir 2-3 times a day. I can always tell when it's full by the heavy feel of the air.
When you can't stand the heat another minute, well, then, it's time for dinner and a movie. Let the air conditioned coolness of restaurant and theater wash over you.
