efficiency experts

As a species, we´ve hit the bedtime barrier. You can eat at your desk, socialize in the break room, and answer text messages on a date, but sooner or later, you´re going to have to sleep. â€After 18, 19 hours awake, your brain function starts to fail,†says Dallas, Texas, sleep-medicine specialist Andrew O. Jamieson. Coffee might keep you up, â€but you´re not going to be focused.â€