#3 Alcohol
This is a tough one, since many people tend to limit their alcohol consumption to evening or nighttime hours. Although alcohol is a depressant, it’s not a terribly effective one, and has a tendency to wear off quickly. It hampers the body’s ability to enter into a state of deep, restful sleep, and that will become apparent in the morning, since it usually makes people feel less rested. Alcohol certainly might help you fall asleep faster, but it won’t help keep you there, or promote a good night’s sleep.