There's at least one every summer - a heat wave. When the heat gets too much, follow these tips from Cottage Life to stay cool. A few simple things you can do are buy cotton sheets and stay away from any recipes that utilize the oven. If it's cooler inside than outside, keep it that way by closing the windows! You can even DIY your own air conditioning. "Grab two pop bottles out of the recycling bin, make a few small modifications by cutting off the bottoms and punching some holes in the bottom half. Then, with the cap screwed on, strap them upside down to the back of the fan with some zip ties, fill the bottles with ice, and voila!"