Live on popsicles and watermelon. Frozen bananas and frozen peas are also good. (You eat them frozen!)
Never leave the house between one o'clock and seven o'clock. (We violate this one by going to exercise at 3:00 p.m., but we tried going at 5:00 a.m. and I was wrecked for the rest of the day, because insomnia.)
Get one of those re-usable cold packs for putting on injuries. Freeze it and put it on your neck and down your back and on your feet. Three cold packs is obviously better, you can do all three places at once, but they're pricy.
Move your workspace directly under your AC vent, or (in my case) your heat pump.
Take cool showers.
Don't cook. Don't cook ANYTHING. See living on popsicles, up there. (Dr. Skull violates this one at least once a week, making chili or a pizza, and I am SO HOT.)
Don't eat big meals, since eating means digesting which means your body is working harder which means it's running hotter. One popsicle, and then two hours later some watermelon, and then maybe a piece of cheese a couple hours after that. Yogurt is also good. Have iced coffee in the morning, and iced water with lemon in it after that.
Wear almost no clothing. (I have a spaghetti strap shirt and very loose, very thin shorts.)
Count the weeks left until mid-September, when maybe things will cool down. (Seven now.)
Whine a lot.