Rieko Saitoh, a publicist for Matsushita Electric Works, demonstrates the company's "Sleep Room," in Tokyo in this June 10, 2004 file photo. A survey of 1,000 people released Monday by the National Sleep Foundation found that participants average six hours and 40 minutes of sleep a night on weeknights, even though they estimated they'd need roughly another 40 minutes of sleep to be at their best. (AP Photo/Shizuo Kambayashi)