Lately I have NOT been getting a ton of sleep, and if you have an infant you definitely know what I am talking about (and if you ARE getting sleep with a three month old around, email me and let me know your secrets!)
But if you are sleep deprived you may have some dark circles under your eyes. Well, take a piece of raw potato and place it under your eyes to reduce the purple or dark shadows on your skin. After you take the potato off dab a yellow tinted concealer there and you are good to go.
You will look full rested even if you feel like sleeping at your desk.