It's Too Hot! Tip #4

Tip #4: Get those windows closed and those shades drawn!
This may go against all summertime reason, but if you can capture that  cooler night air and keep it in your house, the house will stay cooler.  So when you wake up in the morning, keep the curtains closed and shut the windows (or at least take the openings down to mere cracks).  The closed windows will keep the cooler air in and the closed curtains will keep the sun from beating the air into a frenzied heat.  Your house will be cooler inside, even if you don't have air conditioning.