If you have central air conditioning, and you want to save money during the Summer.....break it.
Okay. I'm not being serious [obviously.] We noticed on Sunday that our AC unit didn't seem to be cooling our house down (when your thermostat is set on 74, it should not be 86 degrees inside your home.) We tried working on our unit until around 2:30 on Monday morning (both of us having to work the next day) before we said, "well that's not working" and suffered through sweat-drenched sleep (or attempt to sleep.) Before we left for work the next morning, we moved the dogs' crates downstairs in our finished basement. At least it was 10 degrees cooler down there.
One of my brother and SIL's friends is an HVAC guy so we gave him a ring. Unfortunately, he was out of town. We found another guy who said he could come around 6 or 7 that night.
7 o'clock passed - no phone call. We called and left him a message. 8:30 came, and he called back saying he'd be at our house around 9:45 / 10:00 p.m. At least by that time, the outside temperature had dropped enough for us to open our windows.
Long story short: our AC is now fixed, but what we've noticed is that we can run our AC at a higher temperature (thermostat) because without AC for three days, ANY bit feels great!