Air conditioning system thermostats are typically set between 72 degrees and 75 degrees and 50% relative humidity. By raising the thermostat to 78 degrees and 55% relative humidity, building occupants will still be comfortable
and you’ll reduce the energy required
for cooling by around 13%.

Switch to LED or compact fluorescent (CFL) bulbs.
They last longer and consume far less energy than traditional incandescent bulbs.

When you open the fridge,
the temperature drops by 2 – 5 degrees,
and for every 30 seconds the door stays open, it takes up to a half-hour to get back up to the
right temperature.