You Lose a Lot When You Lose Sleep

From the Huffington Post - (Bold is mine)

Sleep Deprivation Is Killing You (And Making You Fat In The Process)
By Dr. Terry Bradberry

The next time you tell yourself that you’ll sleep when you’re dead, realize that you’re making a decision that can make that day come much sooner. Pushing late into the night is a health and productivity killer.

According to the Division of Sleep Medicine at the Harvard Medical School, the short-term productivity gains from skipping sleep to work are quickly washed away by the detrimental effects of sleep deprivation on your mood, ability to focus, and access to higher-level brain functions for days to come. The negative effects of sleep deprivation are so great that people who are drunk outperform those lacking sleep.

http://www.huffingtonpost.com/entry/sleep-deprivation-is-killing-you-and-making-you-fat_us_594c1d77e4b0f078efd97fe0