Whether you stayed up late watching Jon Stewart or caring for your sick child, skimping on sleep leaves you feeling like a zombie the next day. Most of us need between seven and nine hours of sleep but if you’re like most women, you’re probably not getting enough; the average woman only clocks six hours and 41 minutes of sleep during the work week, according to the National Sleep Foundation in the U.S. Of course, regularly getting the sleep you need is a must. But for those days when you’re running on empty, here’s what you can do to re-energize.