Turn it off when you leave the office to reduce the air conditioning burden as well as electric use. If you're in the air-conditioning mode, turn down your thermostat a bit. You are not a wine bottle. You do not need to be chilled to 55 degrees. If you're in the heat mode, drop the thermy a few degrees.
Sweaters are very British.
Your water heater is a big energy waster. You can turn the temperature down. We're bound to succeed. Our founder was Prometheus. He stole fire from the gods.