Only put it on in rooms you are occupying, don’t leave it on all day unless the temperature is really really cold .

Unplug appliances they draw electricity as well

If you have your own washer / dryer do laundry at night

I live in an old building everything is electric it sucks wish I never moved here . Summer it’s the AC , winter it’s the heat there’s maybe a month or two that my bill isn’t insane and I have UI