Ok this is a silly one. Laundry
I put in a load of laundry in the washer yesterday morning and forgot about it until this morning. It was 50% dry. No, it wasn't moldy. I was able to put the stuff in the dryer on the energy saver setting and the stuff actually dried so I didn't have to use as much electricity. Dryers use a lot of juice. Being lazy and forgetful is really starting to pay off!