Psychology of gadget makes you sleep better
                                
                                
                                    (Newser) -
                                    Strap on a headband, and the Zeo Personal Sleep Coach—basically, a $400 alarm clock—will tell you all about your night, graphing when you were in light sleep, heavy sleep, or rapid-eye movement sleep. Upload to the Web, and you can “slice, dice and cross-compare your sleep data...