Enough sleep is very important. It affects we are happy or not. We can easily find if we sleep enough in the night, we usually have a good mood next day. But, if we do not have enough sleep, sometimes we will feel depressed without a reason. What’s more, sleep also affects our study or work. Try to imagine that a sleepy person how can he listen to the teacher in class or work in their position. It must be a hard job or in low efficiency. Thus, if a person sleep enough, he can do better in their life. In addition, do you find that a person with good sleep usual do not have acne, because enough sleep balance their internal secretion and detox. Knowing the importance of enough sleep, do you still stingy about sleep? Do you still dare to sleep late?