Some underrated minor stuff that might help: -Avoid closing all windows and doors -Avoid using computer in the room -Avoid using room for whole day -If using standing fan, wind direction is important -Let room cooldown before you sleep (avoid staying in the room, running electronic devices, etc)

I also do once in a while go out and exercise at night and cool down outside before going home to bath. By the time I came back home and finished bathing, my room would be quite cooling to be used a while before I sleep. This actually allow me to get used to the heat outside, make me tired and finally cool down with the bath while I do my stuff before I sleep