Nap can be really good for productivity for most people. I wish I could nap. Here&#x27;s a great (and very long) article about the relationship between sleeping and learning <a href="http:&#x2F;&#x2F;super-memory.com&#x2F;articles&#x2F;sleep.htm" rel="nofollow">http:&#x2F;&#x2F;super-memory.com&#x2F;articles&#x2F;sleep.htm</a>