I only recently learned that any electronic device or appliance with an itty-bitty light that's always on is constantly using electricity. On our dishwasher, at the end of a cycle, a little green light comes on above the word CLEAN, and even when you open the door the light stays on. This light has been sucking juice for YEARS at our house!
Same goes for TVs, DVD players, stereos and computers with a standby mode, cellphone chargers always left plugged in, gadgets with a digital clock or timer. Look around your house and see if you can unplug any or hit "cancel" like I now know to do on our dishwasher.