There are stage wise preparations. One week before your study: You may be asked to keep a list of your sleep habits. This will provide your physician and the sleep lab staff with important backgrounds and information on your sleep habits. Also include a list of any medications you are taking and note your use of caffeine, alcohol, or drugs may be requested. On the day of your study: Shower, shampoo and dry your hair. Arrive at least 15 minutes early for your study. Leave your non-essential valuables at home. Bring your two-piece comfortable sleep attire and slippers. What not to do the day of your study: Don’t nap, don’t use hair gels, creams, oils, hairspray, lotions, or creams on your face or body. Don’t wear makeup, jewelry, acrylic nails, or hair braids/weaves. Don’t consume caffeinated foods or beverages (avoid chocolate, coffee, tea, soda, etc.)