Considering what you've listed, I'm not sure there's anything you can do that doesn't involve major expenses. Solar hot water - BIG expense. You could look at a more efficient fridge and freezer. Perhaps a larger fridge with a larger freezer compartment would mean you could get rid of the chest freezer altogether.
Other than that, get a Kill-a-watt and use it. I found a couple of crazy things with mine. My coffee maker used to use 10W 24*7 just to keep the clock running. There are 3 other clocks in the kitchen so now I just unplug it when I'm not making coffee. My old cordless phone and answering machine used 15W 24*7. I replaced it with an energystar labelled combined unit that draws 2W instead. An average house probably has 10 to 20 devices like that that are constantly drawing power - they add up.
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