In general this group isn't very good at flaming, so you should be okay.
I'm with Sweeps . . . I think your bill in in-line with the power you're using, but I agree it's high. Some things to consider:
1) Do you need the mini-fridge operating all of the time? (Or is it more of a special occasion kind of thing?) If you can, unplug it when you're not using it. (Be sure to leave it open or it might mold.)
2) Electric hot water heat is EXPENSIVE. Try doing the laundry in cold (be sure to pretreat stains). Adding some vinegar can help if smells are a problem. (Sounds weird I know!) If you have an electric dryer that's also expensive, try hanging at least some things or at least double spin them so every last drop that the washer can get out is out.
3) As your electric stove/dryer/ESP. WATER HEATER wear out consider switching to gas. It may or my not be worth it based on your nat. gas rates (or whether you even have nat. gas), but at least consider it.
4) See if you can cut down the dehumidifier use. Using your furance fan all year round might help even out the moisture enough that you can cut down significantly.
5) Put a thermal blanket on your water heater.