I've discovered a fantastic application for if you ever need to chill out.
It's called Brainbaths, and it's only 59p.
It contains lots of lovely ambient sounds, but they aren't your run of the mill low quality clips. These are 3D sounds called Holophonics. It's very difficult to explain with words how much better Holophonic is compared to Stereo. For instance when I listen to the track called Dock of the Bay it sounds like the water is right infront of me, like I could reach out and touch it.
To get the best out of the Holophonics you need to use headphones, but even if you play it through surround sound speakers it creates wonderful ambience. You also have the option to play Binaural Beats in the app. And if that wasn't enough after contacting customer support I have heard that they are working on the ability to play your own music with the sounds. I have no idea how long the update will take to arrive though.
This is such a bargain.