As I said on another thread, Ambient stuff is hard to beat when in the mood for it. Tangerine Dream, early Pink Floyd etc, But my current fave is the'Vesper' version of 'Blade runner' soundtrack. So... lights out, volume up and drift away. Kraftwerk 'Autobahn' a good place to start.
Wish I could link to some mp3s, but as we know not allowed. Although links to YouTube seem to be OK. So I'll give it a try(I'll edit in when I find something)
YouTube - ‪Kraftwerk- Autobahn‬‏