put cardboard in the windows to block as much of the radiant heat as possible, closed blackout curtains, run the bathroom vent fan to reduce heat build-up near the ceiling of my poorly insulated tin can. a/c in both ends, fans both ends, mister to add back some humidity that the a/c units remove, also makes the air feel cooler. stay indoors as much as possible, do errands/yard tasks late night/wee hours of morning. wear abbreviated or no clothing. on a 106 degree day a while back, the a/c units couldn't keep up with the heat re-radiating inwards in my tin can and I couldn't get it cooler than about 86 [30 degree spread] inside, so I soaked and wrung out bath towels and draped myself in them. I would dip my head and hair in cold water every few minutes to cool my brain. when I had to go outside I use a cooling vest that uses phase change material [starch and alcohol mixture] that when it is refrigerated for a few hours, it maintains a 45 degree temperature for about 2 hours. I have two of them, one kept in the fridge at all times, swapped out each when the 2 hours is up. that saved my bacon when I hadda attend a family get together last 4th when it was 100 that day. the pretty young bikini'd things looked at me weird but at least I didn't get heat stroke [again]. to prevent night sweats, use a hospital-grade cooling blanket that circulates chilled [55 degrees] distilled water through coils in the blanket. it works.