Nap time

It's not socially acceptable to do it, but sometimes at work, I really feel like taking a nap. It's usually right after lunch. I could just crawl up quietly under my desk and snore for a bit. There has been lots of studies that have shown a little nap time would give a performance boost afterward. The latest from Berkeley suggests that a 90-min nap during the day is good for cognitive performance. A nap allows the brain to empty the hippocampus of short-term memories to the pre-frontal cortex for long-term storage. That emptying, allows you to accept additional short-term memories later in the day, to then commit them to memory at night.

in reference to:

"Dr Matthew Walker, who led the study, reported at the AAAS conference in San Diego, said: "Sleep not only rights the wrong of prolonged wakefulness, but, at a neurocognitive level, it moves you beyond where you were before you took a nap."
- BBC News - Nap 'boosts' brain learning power (view on Google Sidewiki)