One thing you shouldn't skimp on when it comes to your health... sleep.
Researchers at Brigham and Women's Hospital had study participants sleep only about 5 and a half hours a night for three weeks, and then studied the effect.
When participants were finally able to get a solid 10 hours of sleep -- they caught up on some of their sleep deficits. But chronic sleep loss made people vulnerable to errors and accidents.
Other studies have shown that sleep deficits can lead to illness, memory problems and even weight gain.