Circulate the air.
Maximize cross-breezes by opening at least two windows in every room, and then aim a fan out one.
Hang white curtains on your windows to reflect sunlight.
Change your sheets.
Make your bed with Nano-Tex sheets, which block moisture away from your body on hot nights.
Modify your routine.
Shower in the morning or evening, when it’s cooler, so you won’t add to the already humid air inside.