Optimizing Your Sleep Sanctuary Sleep in complete darkness, or as close to it as possible. Even the tiniest bit of light in the room can disrupt your internal clock Keep the temperature in your bedroom no higher than 70 degrees F. When you sleep, your body's internal temperature drops to the lowest level, generally about four hours after you fall asleep. Scientists believe a cooler bedroom may therefore be most conducive to sleep, since it mimics your body's natural temperature drop. Move alarm clocks and other electrical devices away from your bed. If these devices must be used, keep them as far away from your bed as possible, preferably at least 3 feet. Avoid using loud alarm clocks. It is very stressful on your body to be suddenly jolted awake. If you are regularly getting enough sleep, an alarm may even be unnecessary. Reserve your bed for sleeping. If you are used to watching TV or doing work in bed, you may find it harder to relax and drift off to...