def white rabbit by jefferson airplane. some other good ones are a day in the life- beatles on the run= pink floyd so what- miles davis maggie mcgill- the doors all you need is love- the beatles china cat sunflower- grateful dead(aoxomoxoa version is awesome while tripping) abbey road(the whole album) all 5 songs by the third bardo.
She Devil by Tech N9ne is amazing. It's like the perfect background music. T9X by Tech N9ne is also really sick. It's a spooky song though, so only listen if you're chill. I have more, but I'm too lazy.. Ha.