Even when they're turned off, anything that's plugged into the wall can continue to consume energy. By unplugging your devices or using a smart power strip, you'll avoid wasting standby power. Don't forget to unplug your washer and dryer, too.
Turn your water heater down to "low" or to "vacation" mode. If your pool also uses a heater, consider purchasing a pool cover that will help minimize heat loss so that you can avoid the cost to reheat it.