Could using Facebook, a smartphone, or other bright electronic device just before bedtime explain your poor sleep? Bright light is known to disturb sleep, so try keeping your last hour before sleep "technology free" to see if you notice a difference. The research is still unclear, but 95% of adults admit to using technology devices in the hour prior to going to bed. The National Sleep Foundation says 50-70 million Americans complain of not sleeping well in any given week. Is there a connection? While you sleep, your immune system rejuvenates, fights stress, and even becomes a cancer-fighting machine. Don't mess with it. Many online articles link lack of sleep to increased risk for cancer. So, seek restful and restorative sleep.