A CBS news report notes that a nap combined with coffee can reenergize a person for several hours.

“What you do is cool down a cup of drip coffee, which has the highest caffeine content. You drink it very quickly and then you take a 20-minute nap,” he explained. “The caffeine hits your system approximately 20 to 25 minutes, you get enough stage-one, stage-two sleep and you’re good for four hours.”

Get the full story at CBS News.