他们应该出门关灯，洗完手关水龙头并且不能乱扔垃圾。
They should turn off the light upon leaving the room, and turn off the faucet after washing their hands, and not litter around.
出门时请随手关灯。
Turn the light off as you go out.; Please switch off the lights when you leave.
这些事可以简单到放猫咪出门、关灯、关暖气、洗脸刷牙，也可以是瑜伽或冥想。
It could be as simple as letting the cat out, turning out the lights, turning down the heat, washing your face, and brushing your teeth. Or it could be a series of yoga or meditation exercises.
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