We're sleeping better knowing you signed up for Sleep, But Better -- a unique seven-part CNN newsletter designed to guide you to a new era of improved rest in your life.  

The research is clear: Sleeping better will boost your happiness, productivity and life span. It will help you eat better, exercise harder and more easily cope with stress.

Sleep is the fundamental key to all of it.

In only six short lessons -- plus one bonus edition on the risks and rewards of napping -- Sleep, But Better will give you the building blocks to create a sustainable, life-improving habit of getting enough good sleep every night.

Plus, we have product recommendations from our partners with CNN Underscored, need-to-know sleep trivia and more.

So welcome aboard the sleep train. It runs on time and the berth is cool, dark and quiet as it rocks you to sleep. The first stop on your journey is coming to your inbox.

And if you have any suggestions on how this newsletter could be better, please email us at sleepbetter@cnn.com.

Finally, this newsletter is part of a larger wellness-led initiative from CNN called Life, But Better -- an essential source for information and tools to inspire and challenge us to lead better lives. And as we launch new tools, newsletters and series for Life, But Better, we’ll let you know in case you want to check them out!

Good night and sweet dreams,

David Allan
Editorial Director, CNN Features