Below is a link to an article that comes recommended from ATA CEO Jack Newman. The article is titled Sleep: the greatest performance enhancer – here is a brief excerpt:

Newman(6)(4)

“Rather than looking at the deficits of the brain with regards to the lack of sleep, we should be acting upon the research of the benefits on the brain with increased sleep. We need to take care of our brains to optimize our health and well being. So often we hear people saying, “I can’t afford to get that much sleep.” My reply to them is, “you can’t afford not to!” 

Click here to read the entire article: http://adisciplinedmind.com/6/post/2015/05/sleep-the-greatest-performance-enhancer.html