I remember Scott Hagwood, the American Memory Champ saying in his book that if he doesn't get enough sleep the night before an event, he usually does poorly
Here is an interesting article on how "Naps May Boost Memory" By Dave Mosher, LiveScience Staff Writer posted: 07 January 2008
If you want to remember the information in this article, take a nap.
New research conducted by brain researcher Avi Karni of the University of Haifa in Israel explores the possibility that naps help lock in sometimes fleeting long-term memories. A 90-minute daytime snooze might help the most, the study finds... more...