Our power meter shows a digital reading of current usage so I didn't have to buy anything.
The two computers use about 450 kWh a month at idle thanks to no standby. Mine uses a shitton more while gaming so that explains a decent chunk of it. I've turned on the power saving options, hopefully that helps.
The furnace fan was running 24/7 and using ~150 a month so that's on Auto now.
I'm still using nearly double what comparable houses are, even accounting for that. I guess we'll see what my next couple bills look like.