Fatigue

Maybe you think you have too much living to do, so you're adding hours to your day by cutting out on sleep. But does it really work? Here's what a habit of short nights will get you(less than 6 hours):

-Difficulty waking up in the morning
-Inability to concentrate and impaired memory
-Falling asleep in class
-Moodiness, irritability, depression, or anxiety

Establishing a consistent sleep routine is one of the best ways to improve your mental, physical, and emotional health.

You probably already know what caffeine (a stimulant) can do to keep you from getting the rest you need, but what about the affects of nicotine? Both of these substances prevent you from being able to fall asleep, the kind of sleep that fuels and repairs your body for the next day.