You can't go wrong with a good old-fashioned fan to keep the air moving.
Ice is one of the best ways to stay cool. Whether it's in your drink, for chewing, or filling a tub to soak in, ice can make summer bearable.
All the cooling things that don't fit in the above categories.
If all else fails, you can look into installing air conditioning. These options are easy enough to install and can help keep you cooler as the heat wave sweeps the nation.
Some cooling bedding can make it bearable to get into bed on a hot summer's night.