Hanging my laundry to dry instead of running the dryer all the time seems to help. I hang most of the stuff in our bedroom and I feel like it is not as dry in there at night.
DH showers at night and leaves the door open (I would freeze personally) to let the steamy air out.
When the boys take a bath, I leave the water in the tub (and I have been using some to water plants, too). I drain it after a while b/c i don't want my youngest to fall in by accident or my oldest to play in the water and make a mess.
My mom runs her tea kettle on low most of the day (check often so you don't scorch the bottom).