I changed all of my bulbs to LED, all shower heads to low flow, and do my best to keep costs down. There are some wifi enabled plugs that allow you to both monitor usage and control whether it is on or off.
There are also products like the kill-a-watt you can plug into the outlet and then see how much is being drawn. As obsessive as I have become, I have not yet got to that level. I just leave everything unplugged when I am not using it. Between that and the LED bulbs, I have definitely seen a reduction in my electricity bill.
Good luck!