6. Drinking alcohol
A study published in the April 2013 issue of Alcoholism: Clinical and Experimental Research found that drinking excessive amounts of alcohol in the evening creates unsettled sleep during the later stages of the night. “One or two drinks at supper four hours before bed is reasonable, but when you start having four drinks in the evening, or drinking in order to fall asleep, it’s terrible,” says Dr. Samuels. While the study found that alcohol shortens the time it takes to nod off, it also creates a disrupted, less satisfying sleep.