Listening to relaxing music relaxes the mind, soothes the soul, while being great for the heart and your concentration skills.
Ambient is similar to downbeat or lounge music, the main difference being that Ambient rarely has much of a beat and is lite on drums. Chill-out music is basically the same as Ambient, the term Chill-out has gained popularity recently. Waves make very ambient sounds which makes sense since water is thought to be the most relaxing sound to people. If you close your eyes and think of the sound of gentle waves splashing on a beach, you might be surprised how enchanting and relaxing it is.
Electronic ambient music is amazingly beautiful and was started by Brian Eno, Music to Airports is his most famous and groundbreaking track. http://www.youtube.com/watch?v=B9kPIp4MtX0
The Orb, a British Ambient duo, pushed the boundaries of Ambient with Orblivian.
One review stated that it was not ambient, yet the tracks would relax me like none others.
Little Fluffy Clouds is one of their best tracks. http://www.youtube.com/watch?v=_IEFnYpwhNM&feature=related
Organic Ambient music has been around since the beginning of music, and is in many cases international. Tibetan Monks chanting is one of the older known instances of Ambient, this video features the Ahm chant http://www.youtube.com/watch?v=xPIES1mWCig&feature=related.
The Gregorian monks have done lots of ambient, one example is http://www.youtube.com/watch?v=sqwV9l-U8ds&feature=related
Marcome a Canadian singer has done some interesting tracks which are featured at http://marcome.com/
Multilingual Books has a great radio directory of ambient stations at http://multilingualbooks.com/online-radio-music-ambient.html