Importance of good sleep cycle before the SAT

<p>Alright, here's a site that explains why you need a good night sleep which is kinda contridicting what I just said.
<a href="http://www.msnbc.msn.com/id/7077587/site/newsweek/?GT1=6305%5B/url%5D"&gt;http://www.msnbc.msn.com/id/7077587/site/newsweek/?GT1=6305&lt;/a>
I didn't read it all, but it looks useful. Geez, this isn't worth wasting time over.</p>