The physical setup of your bed and bedroom affects your sleep temperature significantly. Here is how to configure everything for optimal cooling.
The Bed: Layer by Layer
Mattress: if you have a memory foam mattress consider a cooling mat on top to address the heat-from-below problem. See The Cooling Mat here.
Fitted sheet: bamboo viscose or percale cotton. Avoid sateen and microfiber. See bamboo sheets here.
Top layer: your cooling blanket. This is the layer that matters most. Use a nylon cooling blanket and leave it loosely draped rather than tightly tucked. Airflow around the blanket helps it dissipate heat. The Stillwell Cloud. See it here.
Pillow: any pillow with a cooling pillowcase. The cover material matters more than the fill for temperature. See the Cool Night Pillowcase here.
The Room: Environmental Setup
Fan position: at body level blowing across you rather than pointing at your face or ceiling. A desk fan on a nightstand works better than a floor or ceiling fan for most hot sleepers.
Blackout curtains: on any south or west-facing windows to block afternoon heat gain.
Thermostat: set to 18-20 degrees if you have climate control. Run it 30 minutes before bed to pre-cool the room.
Ventilation: if outside temperature is lower than the room open a window in the early evening to cool the space before bed.
The Couple Setup
If your partner runs cold use separate blankets. Your cooling blanket on your side. Their preferred blanket on theirs. Meet in the middle. Both people sleep at their optimal temperature without compromise.