I'm working hard on on reducing ours this summer too! Our gas and electric are combined. The June bill is usually $250-$300. July and August bills are generally $350-$400, we've had as high as $425. It's really hot here in the summer-July & August temps hover around 105 and often get to 110+. Going without ac isn't an option for us to consider and I too am home all day.
This year, I am watching the weather extremely carefully so I can turn off the AC even if it's just one day that is below 90 (90 is about my limit). This time of year we do have days that drop down to 88 or so, I have it off today as it's cloudy and around 85. In the past, once it gets hot enough to turn on, it kind of stays on as usually, I feel like it costs more in the end to let the house heat up and then cool it off again. But this time, I figure it's worth it if I can go a whole day and night without turning it on.
When I do have it on, I have it set for 80, which is pretty high for us but I'm trying to just deal with it!! I did turn it down to 78 the other day, I was SO hot and could not cool off-I'm pregnant, in my last trimester, and sometimes that pregnancy heater just goes into overdrive! I've caved a couple of times now and dropped the temp a couple degrees so I could cool off!
Doing the regular stuff too-hanging clothes to dry, keeping lights/appliances off/unplugged when not in use. We have off peak rates so also trying to use the dishwasher at night instead of during the day and things like that.
I hope the savings really adds up. May's bill was great at about $89 . . . but I know we're headed for a pretty big jump come June. It's the AC that kills our utilities budget every year, part of living in a hot climate I guess but I am REALLY trying to control it this year.