This article wouldn't be a reminder but a sermon if I would not provide tips on how one can improve his sleep.
Great factor of a good night sleep lies on individual's sleeping routine and habits. Try one or all of the above.

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• Manage your schedule and designate specific hour of sleep.
  Make sure to stick with a fix schedule everyday including weekends. This will regulate one's body clock, which will help attain

• Stick to a sleep schedule of the same bedtime and wake up time, even on the weekends. This helps to regulate your body's clock and could help you fall asleep and stay asleep for the night.

• Practice an effective bedtime ritual for your personality.

• Take even a short but daily exercise.

• Consider temperature, light, and sound a factor

Sleep is as important as food, water and money. No enough sleep can make one sleepy, look tired, and felt restless.
Being inactive will not help one become target oriented, means less chance to accomplish what is needed to fulfill on daily basis. No one likes that.

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So when you say one should take good care of his health, it also means to ensure we're getting enough sleep to give time for our body to recharge for the next day. :)